ClinicalTrials.gg
CompletedNCT04742491Updated Dec 17, 2025Results posted

Pre-Exposure Prophylaxis for Transgender Women in the US and South America

A Phase 2/3 interventional study of Immediate Intervention Arm and Deferred Intervention Arm in HIV Prevention, sponsored by HIV Prevention Trials Network. Completed at 5 sites in 2 countries. Open to male participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-12-17.

Sponsored by HIV Prevention Trials Network · Phase 2/3, Interventional, and Prevention

Phase
Phase 2/3
Study type
Interventional
Enrollment
304
Allocation
Randomized
Ages
18 Years and older
Sex
Male
01

Study summary

A study to assess the feasibility, acceptability, and preliminary impact of a multi-component strategy to improve pre-exposure prophylaxis (PrEP) uptake and adherence that integrates delivery of biomedical HIV prevention co-located with gender-affirming transgender care (hormonal therapy and medical monitoring) and Peer Health Navigation (PHN) using Strengths-Based Case Management (SBCM) professional supervision.

Multi-site, open-label study with each participant randomized 1:1 to Immediate Intervention vs. 6-month Deferred Intervention Arms. Both arms will be provided PrEP and sexually transmitted infection (STI) screening and treatment. Participants in the Immediate Intervention Arm will receive co-located gender-affirming medical care and PHN using SBCM starting at the Enrollment Visit. Participants in the Deferred Intervention Arm will receive linkage to external gender-affirming medical care and case management services during the deferred period and will transition to the study intervention six months following the Enrollment Visit.

Read the detailed description

entered elsewhere

02

Conditions studied

  • HIV Prevention

Keywords

  • Transgender women
  • TGW
03

In context

Lead sponsor

HIV Prevention Trials Network is the lead sponsor of 24 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Male
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • TGW (assigned male at birth, trans-feminine spectrum - as defined in the SSP Manual - by self-report) who meet all of the following criteria are eligible for inclusion in this study.
  • Eighteen years or older at the time of screening.
  • Willing and able to provide for the study.
  • Interest in PrEP - as defined in the SSP Manual.
  • Non-reactive test results at Screening and Enrollment.
  • Available to return for all study visits and within site catchment area, as defined per site's Standard Operating Procedures (SOP).
  • At risk for sexually acquiring HIV infection based on self-report of at least one of the following:

    1. Any anal or vaginal sex with one or more serodiscordant or HIV-unknown serostatus sexual partners in the previous 3 months, regardless of condom use.
    2. Anal or vaginal sex in exchange for money, food, shelter, or other goods or favors in the previous 3 months.
    3. History of STI(s) in the past 6 months.
  • Willing to undergo all required study procedures.
  • General good health, as evidenced by the following laboratory values:

    1. Calculated ≥ 60 mL/minute using the Cockcroft-Gault equation.
    2. (ALT) and aspartate aminotransferase (AST) \< 2.5 times the (ULN.)
    3. surface antigen (HBsAg) negative.

Note: Otherwise eligible participants with laboratory results outside the above-mentioned values, with the exception of those with reactive HIV test, can be re-tested during the screening window. Participants with reactive HIV tests will not be able to rescreen.

Note: Participants who practice receptive vaginal sex cannot be provided Descovy® as it is not approved for this indication.

Exclusion criteria

Exclusion Criteria:

  1. Any reactive or positive test result at Screening or Enrollment, even if HIV infection is not confirmed.
  2. Plans to move away from the site area within the next 18 months.
  3. Co-enrollment in any other research study that may interfere with this study (as provided by self-report or other available documentation). Exceptions may be made after consultation with the Clinical Management Committee (CMC).
  4. Current or chronic history of liver disease (e.g., non-alcoholic or alcoholic steatohepatitis) or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome, asymptomatic gallstones, or cholecystectomy).
  5. History of deep vein thrombosis, pulmonary embolism, and/or clotting disorder.
  6. Active or planned use of medications with significant drug interactions as described in the Package Insert for Truvada® or Descovy®, per clinician's discretion (provided by selfreport or obtained from medical history or medical records). See Section 5.8 for a full list of drug interactions.
  7. Any other condition, including but not limited to alcohol or substance abuse and uncontrolled medical condition and/or allergies, that, in the opinion of the Investigator of Record (IoR)/designee, would preclude , make study participation unsafe, complicate interpretation of study outcome data, or otherwise interfere with achieving the study objectives would make the patient unsuitable for the study or unable/unwilling to comply with the study requirements.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
304 participants (actual)

Study arms

  • Experimental
    Immediate Intervention Arm

    PrEP (pre-exposure prophylaxis) provision, STI screening and treatment, GAHT (gender-affirming hormonal therapy), peer-health management using strengths-based management. PrEP provision includes using one daily tablet of Descovy (emtricitabine 200 mg and tenofovir alafenamide 25mg, FTC/TAF) or one daily tablet of Truvada (emtricitabine 200 mg and tenofovir disoproxil fumarate 300 mg, FTC/TDF) in the US, and one daily tablet of Truvada (emtricitabine 200 mg and tenofovir disoproxil fumarate 300 mg, FTC/TDF) in Brazil.

    Drug: Immediate Intervention Arm

  • Experimental
    Deferred Intervention Arm

    0-6 months PrEP (pre-exposure prophylaxis) provision and STI screening and treatment. From months 6-18, GAHT (gender-affirming hormonal therapy) and peer-health management using strengths-based management. PrEP provision includes one daily tablet of Descovy (emtricitabine 200 mg and tenofovir alafenamide 25mg, FTC/TAF) or one daily tablet of Truvada (emtricitabine 200 mg and tenofovir disoproxil fumarate 300 mg, FTC/TDF) in the US, and one daily table of Truvada (emtricitabine 200 mg and tenofovir disoproxil fumarate 300 mg, FTC/TDF) in Brazil.

    Drug: Deferred Intervention Arm

Interventions

  • DrugImmediate Intervention Arm

    Truvada, Descovy in the United States; Truvada in Brazil

    Also known as: Truvada, Descovy

  • DrugDeferred Intervention Arm

    Truvada, Descovy in the United States; Truvada in Brazil

    Also known as: Truvada, Descovy

06

What researchers measure

Primary outcomes

  1. PrEP Uptake

    Time to PrEP initiation is defined as the duration from enrollment to the PrEP start date.

    Time frame: 0-18 months

  2. PrEP Adherence

    Self-reported adherence to daily PrEP by study visit

    Time frame: 0-18 months

  3. Acceptability and Feasibility of Co-located Services

    Number of participants accepting co-located GAHT services at baseline and subsequent quarterly study visits.

    Time frame: 0-18 months

  4. Participant Retention at Weeks 26, 52 and 78

    Participant retention at weeks 26, 52 and 78 by study arm. Retention defined as the number of participants who completed the visit divided by the number of participants who are expected or have completed the visit.

    Time frame: Weeks 26, 52, 78

  5. Acceptability and Feasibility of Peer Health Navigation

    The average number of peer health navigator encounters.

    Time frame: 0-18 months

  6. Acceptability and Feasibility of Peer Health Navigation

    Number of each type of peer health navigation encounter.

    Time frame: 0-18 months

  7. Acceptability and Feasibility of Co-located Services

    Percentage of participants who report desire for co-located services at the end of the study

    Time frame: 0-18 months

  8. PrEP Adherence

    The average number of days to first PrEP permanent discontinuation.

    Time frame: 0-18 months

  9. PrEP Adherence

    The median number of days to first PrEP permanent discontinuation.

    Time frame: 0-18 months

  10. PrEP Adherence

    Participants with different levels of TFV-DP concentrations in DBS measured at quarterly follow-up visits after PrEP initiation.

    Time frame: 0-18 months

  11. PrEP Adherence

    Participants with different levels FTC-TP concentrations in DBS measured at quarterly follow-up visits after PrEP initiation.

    Time frame: 0-18 months

  12. PrEP Adherence

    The proportion of TGW determined to be adherent at the Week 26 visit was compared by study arm. PrEP adherence was defined as having a detectable concentration of PrEP (Truvada or Descovy) in DBS sample.

    Time frame: Week 26

  13. PrEP Persistent

    PrEP persistent is defined as the proportion of study visits where a participant demonstrates high adherence to PrEP among those who initiated PrEP at the study clinic. High adherence at a visit is based on drug concentrations in dried blood spots (DBS): Truvada (TDF/FTC): TFV-DP ≥ 900 fmol/punch Descovy (TAF/FTC): TFV-DP ≥ 950 fmol/punch PrEP persistent reflects sustained high PrEP adherence across multiple visits over time, rather than high PrEP adherence at a single point.

    Time frame: 0-18 months

  14. PrEP Uptake

    Comparison of PrEP uptake between study arms at the end of Week 26. PrEP uptake is defined as whether the participant initiated PrEP at the study clinic..

    Time frame: Week 26

Secondary outcomes

  1. Examining Changes in Sexual Risk-taking Behavior

    Describing condom use with HIV+ people, measured by assessments at enrollment and quarterly through Week 78.

    Time frame: 0-18 months

  2. Examining Changes in Sexual Risk-taking Behavior

    Describing condom use with HIV unknown people, measured by assessments at enrollment and quarterly through Week 78.

    Time frame: 0-18 months

  3. Examining Changes in Sexual Risk-taking Behavior

    Frequency of being high on drugs/drunk during sex, measured by assessments at enrollment and quarterly through Week 78.

    Time frame: 0-18 months

  4. Examining Changes in Sexual Risk-taking Behavior

    Had sex for money/drugs/housing/food/other things, measured by assessments at enrollment and quarterly through Week 78.

    Time frame: 0-18 months

  5. Prevalence of STI Infection (GC, CT, Syphilis) at Baseline

    To determine baseline prevalence of STIs (Neisseria gonorrhoeae \[GC\], Chlamydia trachomatis \[CT\], and Treponema pallidum (syphilis)) by study arm

    Time frame: 0 months

  6. Estimate Prevalence of Baseline Laboratory Values.

    To obtain baseline laboratory data to evaluate the cohort's suitability for future PrEP intervention studies (e.g., prevalence of renal insufficiency, hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, etc.). Logistic regression models will be used for estimating prevalence of baseline conditions.

    Time frame: 0 months

  7. Gender-Affirming Hormone Therapy by Visit

    Taken hormones for gender identity/transition

    Time frame: 0-18 months

  8. Gender-Affirming Hormone Therapy by Visit

    Currently taking hormones for gender identity/transition

    Time frame: 0-18 months

  9. Gender-Affirming Hormone Therapy by Visit

    Where do you currently get your hormones?

    Time frame: 0-18 months

  10. Gender-Affirming Hormone Therapy by Visit

    Ever had a substance (like silicone or other fillers) injected to fill out face or make figure look more womanly

    Time frame: 0-18 months

  11. Gender-Affirming Hormone Therapy by Visit

    Ever had breast augmentation/surgery

    Time frame: 0-18 months

  12. Gender-Affirming Hormone Therapy by Visit

    Ever had vaginoplasty/labiaplasty/SRS/GRS/GCS

    Time frame: 0-18 months

  13. Annual Incidence of HIV Infections

    The number of incident HIV infections at each time point by arm. Note: The HIV infection reported at Week 26 occurred during an interim visit between Week 26 and Week 39.

    Time frame: 0-18 months

  14. Incidence of STI Infection (GC, CT, Syphilis)

    To determine annual incidence of STIs (Neisseria gonorrhoeae \[GC\], Chlamydia trachomatis \[CT\], and Treponema pallidum (syphilis)) and to examine changes in STI over time by study arm.

    Time frame: 0-18 months

  15. Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Uptake

    PrEP uptake is defined as whether the participant initiated PrEP at the study clinic during the study cycle.

    Time frame: 0-18 months

  16. Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Associated With PrEP Adherence Across Study Visits.

    The number of study visits at which participants were highly adherent to PrEP, among those who initiated PrEP at the study clinic. High adherence at a given visit is determined using drug concentrations in dried blood spots (DBS): Truvada: TFV-DP ≥ 900 fmol/punch Descovy: TFV-DP ≥ 950 fmol/punch Arm-level results are presented as the total number of visits at which participants in each arm were highly adherent to PrEP, reported as the number and percentage of visits.

    Time frame: 0-18 months

  17. Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Persistence

    PrEP persistence is defined as the proportion of study visits at which a participant demonstrates high adherence to PrEP among participants who initiated PrEP at the study clinic. High adherence at a given visit is determined using drug concentrations in dried blood spots (DBS): Truvada: TFV-DP ≥ 900 fmol/punch Descovy: TFV-DP ≥ 950 fmol/punch PrEP persistence reflects sustained high adherence across multiple visits over time per participant, rather than overall high adherence at all time points. For each participant, this proportion was converted to a percentage; arm-level results are presented as the mean of participant-level percentages in each arm in the outcome measure data table.

    Time frame: 0-18 months

  18. Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to Interest in Future HIV Research

    An overall composite flag (Yes/No) for interest in future HIV research was created at the end of study using participant responses collected at enrollment, weeks 26, 52, and 78. Those who showed interest in future HIV research (Yes) were reported in the outcome measure data table.

    Time frame: 0-18 months

07

Results

Posted Dec 17, 2025

Participant flow

Participant flow — Overall Study
MilestoneImmediate Intervention ArmDeferred Intervention Arm
Started149155
Week 13 follow-up133139
Week 26 follow-up125136
Week 39 follow-up118128
Week 52 follow-up116123
Week 65 follow-up114126
Completed126128
Not completed2327
Withdrew: Death20
Withdrew: Participant unwilling or unable to comply with required study procedures11
Withdrew: Lost to follow-up68
Withdrew: Withdrawal by subject42
Withdrew: One or more reactive hiv test results or acute hiv infection suspected21
Withdrew: Participant refused further participation27
Withdrew: Participant unable to adhere to visit schedule34
Withdrew: Other reasons34

Outcome measures

PrimaryPrEP Uptake

Time to PrEP initiation is defined as the duration from enrollment to the PrEP start date.

Time frame:
0-18 months
Reported as:
Mean · days
PrEP Uptake
daysImmediate Intervention ArmDeferred Intervention Arm
PrEP Uptake16.2 ± 66.711.4 ± 4.3
PrimaryPrEP Adherence

Self-reported adherence to daily PrEP by study visit

Time frame:
0-18 months
Reported as:
Count of participants · Participants
PrEP Adherence
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — < 2 doses per week21
Enrollment — 2-3 doses per week23
Enrollment — 4-6 doses per week64
Enrollment — 7 doses per week1920
Enrollment — Missing118125
Week 13 — < 2 doses per week38
Week 13 — 2-3 doses per week23
Week 13 — 4-6 doses per week1927
Week 13 — 7 doses per week7975
Week 13 — Missing3026
Week 26 — < 2 doses per week77
Week 26 — 2-3 doses per week72
Week 26 — 4-6 doses per week1221
Week 26 — 7 doses per week7672
Week 26 — Missing2229
Week 39 — < 2 doses per week44
Week 39 — 2-3 doses per week35
Week 39 — 4-6 doses per week1623
Week 39 — 7 doses per week6171
Week 39 — Missing3025
Week 52 — < 2 doses per week45
Week 52 — 2-3 doses per week35
Week 52 — 4-6 doses per week1816
Week 52 — 7 doses per week5363
Week 52 — Missing3731
Week 65 — < 2 doses per week25
Week 65 — 2-3 doses per week15
Week 65 — 4-6 doses per week1621
Week 65 — 7 doses per week5761
Week 65 — Missing3330
Week 78 — < 2 doses per week39
Week 78 — 2-3 doses per week77
Week 78 — 4-6 doses per week1716
Week 78 — 7 doses per week5161
Week 78 — Missing4736
PrimaryAcceptability and Feasibility of Co-located Services

Number of participants accepting co-located GAHT services at baseline and subsequent quarterly study visits.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Acceptability and Feasibility of Co-located Services
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment680
Week 131060
Week 2610966
Week 3911390
Week 5211493
Week 6511593
Week 7811693
PrimaryParticipant Retention at Weeks 26, 52 and 78

Participant retention at weeks 26, 52 and 78 by study arm. Retention defined as the number of participants who completed the visit divided by the number of participants who are expected or have completed the visit.

Time frame:
Weeks 26, 52, 78
Reported as:
Count of participants · Participants
Participant Retention at Weeks 26, 52 and 78
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Week 26125135
Week 52115123
Week 78126128
PrimaryAcceptability and Feasibility of Peer Health Navigation

The average number of peer health navigator encounters.

Time frame:
0-18 months
Reported as:
Mean · encounters
Acceptability and Feasibility of Peer Health Navigation
encountersImmediate Intervention ArmDeferred Intervention Arm
Acceptability and Feasibility of Peer Health Navigation5.7 ± 1.65.5 ± 1.2
PrimaryAcceptability and Feasibility of Peer Health Navigation

Number of each type of peer health navigation encounter.

Time frame:
0-18 months
Reported as:
Count of units · Encounters
Acceptability and Feasibility of Peer Health Navigation
EncountersImmediate Intervention ArmDeferred Intervention Arm
In-person519427
Email00
Text167
Phone258256
Video encounter4647
PrimaryAcceptability and Feasibility of Co-located Services

Percentage of participants who report desire for co-located services at the end of the study

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Acceptability and Feasibility of Co-located Services
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Acceptability and Feasibility of Co-located Services106107
Statistical analysis
  • Immediate Intervention Arm · Chi-squared · p = 0.80 · Percentage: 73.10 · 95% CI 65.89 to 80.30
  • Deferred Intervention Arm · Chi-squared · p = 0.80 · Percentage: 71.81 · 95% CI 64.59 to 79.04The estimates and C.I. (In percentage) are derived using Chi-squared test.
PrimaryPrEP Adherence

The average number of days to first PrEP permanent discontinuation.

Time frame:
0-18 months
Reported as:
Mean · days
PrEP Adherence
daysImmediate Intervention ArmDeferred Intervention Arm
PrEP Adherence364.1 ± 185.2361.1 ± 255.2
PrimaryPrEP Adherence

The median number of days to first PrEP permanent discontinuation.

Time frame:
0-18 months
Reported as:
Median · days
PrEP Adherence
daysImmediate Intervention ArmDeferred Intervention Arm
PrEP Adherence373 (245 to 499)409 (141 to 533)
PrimaryPrEP Adherence

Participants with different levels of TFV-DP concentrations in DBS measured at quarterly follow-up visits after PrEP initiation.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
PrEP Adherence
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Unquantifiable8083
Enrollment — Less than 2 doses per week1015
Enrollment — 2-3 doses per week53
Enrollment — 4-6 doses per week512
Enrollment — 7 doses per week54
Week 13 — Unquantifiable1910
Week 13 — Less than 2 doses per week2325
Week 13 — 2-3 doses per week610
Week 13 — 4-6 doses per week2827
Week 13 — 7 doses per week3543
Week 26 — Unquantifiable2120
Week 26 — Less than 2 doses per week2328
Week 26 — 2-3 doses per week812
Week 26 — 4-6 doses per week3226
Week 26 — 7 doses per week2434
Week 39 — Unquantifiable3123
Week 39 — Less than 2 doses per week1919
Week 39 — 2-3 doses per week69
Week 39 — 4-6 doses per week2227
Week 39 — 7 doses per week2234
Week 52 — Unquantifiable2922
Week 52 — Less than 2 doses per week1817
Week 52 — 2-3 doses per week148
Week 52 — 4-6 doses per week1932
Week 52 — 7 doses per week2031
Week 65 — Unquantifiable2721
Week 65 — Less than 2 doses per week1926
Week 65 — 2-3 doses per week129
Week 65 — 4-6 doses per week1722
Week 65 — 7 doses per week2335
Week 78 — Unquantifiable3932
Week 78 — Less than 2 doses per week2220
Week 78 — 2-3 doses per week1012
Week 78 — 4-6 doses per week1623
Week 78 — 7 doses per week2327
PrimaryPrEP Adherence

Participants with different levels FTC-TP concentrations in DBS measured at quarterly follow-up visits after PrEP initiation.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
PrEP Adherence
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment1520
Week 137387
Week 266774
Week 395175
Week 525275
Week 655570
Week 785159
PrimaryPrEP Adherence

The proportion of TGW determined to be adherent at the Week 26 visit was compared by study arm. PrEP adherence was defined as having a detectable concentration of PrEP (Truvada or Descovy) in DBS sample.

Time frame:
Week 26
Reported as:
Count of participants · Participants
PrEP Adherence
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
PrEP Adherence87100
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · Binomial Distribution · p = 0.59
PrimaryPrEP Persistent

PrEP persistent is defined as the proportion of study visits where a participant demonstrates high adherence to PrEP among those who initiated PrEP at the study clinic. High adherence at a visit is based on drug concentrations in dried blood spots (DBS): Truvada (TDF/FTC): TFV-DP ≥ 900 fmol/punch Descovy (TAF/FTC): TFV-DP ≥ 950 fmol/punch PrEP persistent reflects sustained high PrEP adherence across multiple visits over time, rather than high PrEP adherence at a single point.

Time frame:
0-18 months
Reported as:
Mean · percent of visits
PrEP Persistent
percent of visitsImmediate Intervention ArmDeferred Intervention Arm
PrEP Persistent41.7 ± 40.950.5 ± 43.2
PrimaryPrEP Uptake

Comparison of PrEP uptake between study arms at the end of Week 26. PrEP uptake is defined as whether the participant initiated PrEP at the study clinic..

Time frame:
Week 26
Reported as:
Count of participants · Participants
PrEP Uptake
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
PrEP Uptake127135
Statistical analysis
  • Immediate Intervention Arm · Binomial Distribution · p = 0.6381 · Percentage: 85.23 · 95% CI 79.54 to 90.93The estimates and C.I. (In percentage) are derived using binomial distribution.
  • Deferred Intervention Arm · Binomial Distribution · p = 0.6381 · Percentage: 87.10 · 95% CI 81.82 to 92.37The estimates and C.I. (In percentage) are derived using binomial distribution.
SecondaryExamining Changes in Sexual Risk-taking Behavior

Describing condom use with HIV+ people, measured by assessments at enrollment and quarterly through Week 78.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Examining Changes in Sexual Risk-taking Behavior
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Missing01
Enrollment — No sex912
Enrollment — Oral sex only107
Enrollment — I did not have sex with anyone whom I knew was HIV+10188
Enrollment — None of the time1119
Enrollment — Less than half the time37
Enrollment — About half the time24
Enrollment — More than half the time54
Enrollment — All of the time611
Week 13 — Missing01
Week 13 — No sex1116
Week 13 — Oral sex only108
Week 13 — I did not have sex with anyone whom I knew was HIV+8187
Week 13 — None of the time78
Week 13 — Less than half the time63
Week 13 — About half the time13
Week 13 — More than half the time91
Week 13 — All of the time812
Week 26 — Missing01
Week 26 — No sex1814
Week 26 — Oral sex only179
Week 26 — I did not have sex with anyone whom I knew was HIV+6980
Week 26 — None of the time68
Week 26 — Less than half the time36
Week 26 — About half the time31
Week 26 — More than half the time13
Week 26 — All of the time79
Week 39 — Missing02
Week 39 — No sex1313
Week 39 — Oral sex only139
Week 39 — I did not have sex with anyone whom I knew was HIV+6875
Week 39 — None of the time612
Week 39 — Less than half the time33
Week 39 — About half the time23
Week 39 — More than half the time43
Week 39 — All of the time58
Week 52 — Missing46
Week 52 — No sex1812
Week 52 — Oral sex only29
Week 52 — I did not have sex with anyone whom I knew was HIV+6567
Week 52 — None of the time712
Week 52 — Less than half the time45
Week 52 — About half the time12
Week 52 — More than half the time51
Week 52 — All of the time96
Week 65 — Missing47
Week 65 — No sex1618
Week 65 — Oral sex only62
Week 65 — I did not have sex with anyone whom I knew was HIV+6270
Week 65 — None of the time59
Week 65 — Less than half the time43
Week 65 — About half the time21
Week 65 — More than half the time30
Week 65 — All of the time712
Week 78 — Missing94
Week 78 — No sex2320
Week 78 — Oral sex only20
Week 78 — I did not have sex with anyone whom I knew was HIV+7079
Week 78 — None of the time412
Week 78 — Less than half the time33
Week 78 — About half the time61
Week 78 — More than half the time12
Week 78 — All of the time78
SecondaryExamining Changes in Sexual Risk-taking Behavior

Describing condom use with HIV unknown people, measured by assessments at enrollment and quarterly through Week 78.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Examining Changes in Sexual Risk-taking Behavior
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Missing01
Enrollment — No sex912
Enrollment — Oral sex only107
Enrollment — No sex with anyone whose HIV status was unknown3037
Enrollment — None of the time2017
Enrollment — Less than half the time2019
Enrollment — About half the time139
Enrollment — More than half of the time1822
Enrollment — All of the time2729
Week 13 — Missing01
Week 13 — No sex1116
Week 13 — Oral sex only108
Week 13 — No sex with anyone whose HIV status was unknown3434
Week 13 — None of the time2419
Week 13 — Less than half the time915
Week 13 — About half the time105
Week 13 — More than half of the time1619
Week 13 — All of the time1922
Week 26 — Missing01
Week 26 — No sex1814
Week 26 — Oral sex only179
Week 26 — No sex with anyone whose HIV status was unknown2840
Week 26 — None of the time1421
Week 26 — Less than half the time1113
Week 26 — About half the time76
Week 26 — More than half of the time1310
Week 26 — All of the time1617
Week 39 — Missing02
Week 39 — No sex1313
Week 39 — Oral sex only139
Week 39 — No sex with anyone whose HIV status was unknown3750
Week 39 — None of the time1310
Week 39 — Less than half the time1010
Week 39 — About half the time63
Week 39 — More than half of the time910
Week 39 — All of the time1321
Week 52 — Missing46
Week 52 — No sex1812
Week 52 — Oral sex only29
Week 52 — No sex with anyone whose HIV status was unknown4053
Week 52 — None of the time119
Week 52 — Less than half the time86
Week 52 — About half the time53
Week 52 — More than half of the time134
Week 52 — All of the time1418
Week 65 — Missing47
Week 65 — No sex1618
Week 65 — Oral sex only62
Week 65 — No sex with anyone whose HIV status was unknown4246
Week 65 — None of the time1615
Week 65 — Less than half the time63
Week 65 — About half the time26
Week 65 — More than half of the time79
Week 65 — All of the time1016
Week 78 — Missing94
Week 78 — No sex2320
Week 78 — Oral sex only20
Week 78 — No sex with anyone whose HIV status was unknown4453
Week 78 — None of the time1515
Week 78 — Less than half the time115
Week 78 — About half the time27
Week 78 — More than half of the time98
Week 78 — All of the time1017
SecondaryExamining Changes in Sexual Risk-taking Behavior

Frequency of being high on drugs/drunk during sex, measured by assessments at enrollment and quarterly through Week 78.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Examining Changes in Sexual Risk-taking Behavior
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Missing01
Enrollment — No sex912
Enrollment — Oral sex only107
Enrollment — None of the time6852
Enrollment — Less than half the time3440
Enrollment — About half the time613
Enrollment — More than half of the time1215
Enrollment — All of the time710
Enrollment — Prefer not to answer13
Week 13 — Missing01
Week 13 — No sex1116
Week 13 — Oral sex only108
Week 13 — None of the time7253
Week 13 — Less than half the time1927
Week 13 — About half the time916
Week 13 — More than half of the time412
Week 13 — All of the time73
Week 13 — Prefer not to answer13
Week 26 — Missing01
Week 26 — No sex1814
Week 26 — Oral sex only179
Week 26 — None of the time5754
Week 26 — Less than half the time2133
Week 26 — About half the time28
Week 26 — More than half of the time26
Week 26 — All of the time56
Week 26 — Prefer not to answer20
Week 39 — Missing02
Week 39 — No sex1313
Week 39 — Oral sex only139
Week 39 — None of the time5151
Week 39 — Less than half the time1828
Week 39 — About half the time811
Week 39 — More than half of the time57
Week 39 — All of the time36
Week 39 — Prefer not to answer31
Week 52 — Missing46
Week 52 — No sex1812
Week 52 — Oral sex only29
Week 52 — None of the time5447
Week 52 — Less than half the time2125
Week 52 — About half the time68
Week 52 — More than half of the time36
Week 52 — All of the time46
Week 52 — Prefer not to answer31
Week 65 — Missing47
Week 65 — No sex1618
Week 65 — Oral sex only62
Week 65 — None of the time5851
Week 65 — Less than half the time1522
Week 65 — About half the time511
Week 65 — More than half of the time23
Week 65 — All of the time24
Week 65 — Prefer not to answer14
Week 78 — Missing94
Week 78 — No sex2320
Week 78 — Oral sex only20
Week 78 — None of the time5755
Week 78 — Less than half the time1829
Week 78 — About half the time511
Week 78 — More than half of the time65
Week 78 — All of the time44
Week 78 — Prefer not to answer11
SecondaryExamining Changes in Sexual Risk-taking Behavior

Had sex for money/drugs/housing/food/other things, measured by assessments at enrollment and quarterly through Week 78.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Examining Changes in Sexual Risk-taking Behavior
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Missing147153
Enrollment — No00
Enrollment — Yes00
Enrollment — Prefer not to answer00
Week 13 — Missing01
Week 13 — No90101
Week 13 — Yes4032
Week 13 — Prefer not to answer35
Week 26 — Missing01
Week 26 — No85101
Week 26 — Yes3624
Week 26 — Prefer not to answer35
Week 39 — Missing00
Week 39 — No83104
Week 39 — Yes2921
Week 39 — Prefer not to answer23
Week 52 — Missing20
Week 52 — No7592
Week 52 — Yes3723
Week 52 — Prefer not to answer15
Week 65 — Missing00
Week 65 — No7799
Week 65 — Yes2921
Week 65 — Prefer not to answer32
Week 78 — Missing00
Week 78 — No90107
Week 78 — Yes3219
Week 78 — Prefer not to answer33
SecondaryPrevalence of STI Infection (GC, CT, Syphilis) at Baseline

To determine baseline prevalence of STIs (Neisseria gonorrhoeae \[GC\], Chlamydia trachomatis \[CT\], and Treponema pallidum (syphilis)) by study arm

Time frame:
0 months
Reported as:
Count of participants · Participants
Prevalence of STI Infection (GC, CT, Syphilis) at Baseline
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Gonorrhea1515
Chlamydia Trachomatis1515
Syphilis (Positive/Reactive)3832
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.91 · Odds ratio (or): 0.96 · 95% CI 0.45 to 2.03
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.91 · Odds ratio (or): 0.96 · 95% CI 0.45 to 2.03
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.32 · Odds ratio (or): 0.76 · 95% CI 0.45 to 1.30
SecondaryEstimate Prevalence of Baseline Laboratory Values.

To obtain baseline laboratory data to evaluate the cohort's suitability for future PrEP intervention studies (e.g., prevalence of renal insufficiency, hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, etc.). Logistic regression models will be used for estimating prevalence of baseline conditions.

Time frame:
0 months
Reported as:
Count of participants · Participants
Estimate Prevalence of Baseline Laboratory Values.
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Hepatitis B Infection01
Hepatitis C Infection23
Renal Insufficiency00
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.69 · Odds ratio (or): 1.45 · 95% CI 0.24 to 8.81
SecondaryGender-Affirming Hormone Therapy by Visit

Taken hormones for gender identity/transition

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment96101
Week 139196
Week 269393
Week 398596
Week 528693
Week 658290
Week 789396
SecondaryGender-Affirming Hormone Therapy by Visit

Currently taking hormones for gender identity/transition

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment8390
Week 138892
Week 268991
Week 398490
Week 528588
Week 657988
Week 789091
SecondaryGender-Affirming Hormone Therapy by Visit

Where do you currently get your hormones?

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment — Missing00
Enrollment — Only from medical providers4750
Enrollment — Medical providers and from friends, online, or other sources1411
Enrollment — Only from friends, online, or other non-licensed sources1621
Enrollment — Some other source68
Week 13 — Missing00
Week 13 — Only from medical providers7072
Week 13 — Medical providers and from friends, online, or other sources1113
Week 13 — Only from friends, online, or other non-licensed sources13
Week 13 — Some other source64
Week 26 — Missing00
Week 26 — Only from medical providers6880
Week 26 — Medical providers and from friends, online, or other sources137
Week 26 — Only from friends, online, or other non-licensed sources14
Week 26 — Some other source70
Week 39 — Missing00
Week 39 — Only from medical providers6578
Week 39 — Medical providers and from friends, online, or other sources149
Week 39 — Only from friends, online, or other non-licensed sources30
Week 39 — Some other source23
Week 52 — Missing00
Week 52 — Only from medical providers6974
Week 52 — Medical providers and from friends, online, or other sources1013
Week 52 — Only from friends, online, or other non-licensed sources41
Week 52 — Some other source20
Week 65 — Missing00
Week 65 — Only from medical providers5970
Week 65 — Medical providers and from friends, online, or other sources1717
Week 65 — Only from friends, online, or other non-licensed sources21
Week 65 — Some other source10
Week 78 — Missing00
Week 78 — Only from medical providers6871
Week 78 — Medical providers and from friends, online, or other sources1718
Week 78 — Only from friends, online, or other non-licensed sources52
Week 78 — Some other source00
SecondaryGender-Affirming Hormone Therapy by Visit

Ever had a substance (like silicone or other fillers) injected to fill out face or make figure look more womanly

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment2729
Week 1325
Week 2654
Week 3953
Week 5267
Week 6533
Week 7845
SecondaryGender-Affirming Hormone Therapy by Visit

Ever had breast augmentation/surgery

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment3625
Week 1331
Week 2651
Week 3931
Week 5250
Week 6540
Week 7811
SecondaryGender-Affirming Hormone Therapy by Visit

Ever had vaginoplasty/labiaplasty/SRS/GRS/GCS

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Gender-Affirming Hormone Therapy by Visit
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment77
Week 1310
Week 2610
Week 3911
Week 5210
Week 6510
Week 7821
SecondaryAnnual Incidence of HIV Infections

The number of incident HIV infections at each time point by arm. Note: The HIV infection reported at Week 26 occurred during an interim visit between Week 26 and Week 39.

Time frame:
0-18 months
Reported as:
Number · participants
Annual Incidence of HIV Infections
participantsImmediate Intervention ArmDeferred Intervention Arm
Enrollment00
Week 1300
Week 2610
Week 3921
Week 5200
Week 6500
Week 7820
Statistical analysis
  • Immediate Intervention Arm · Incidence rate: 1.92 · 95% CI 0.72 to 5.12
  • Deferred Intervention Arm · Incidence rate: 0.48 · 95% CI 0.07 to 3.39
SecondaryIncidence of STI Infection (GC, CT, Syphilis)

To determine annual incidence of STIs (Neisseria gonorrhoeae \[GC\], Chlamydia trachomatis \[CT\], and Treponema pallidum (syphilis)) and to examine changes in STI over time by study arm.

Time frame:
0-18 months
Reported as:
Number · participants
Incidence of STI Infection (GC, CT, Syphilis)
participantsImmediate Intervention ArmDeferred Intervention Arm
Number of STI infections (first incidence)5151
Week 13821
Week 261710
Week 3948
Week 5271
Week 6576
Week 7885
Statistical analysis
  • Immediate Intervention Arm · Poisson Regression · p = 0.93 · Incidence rate: 31.47 · 95% CI 23.86 to 41.51Incidence Rate of any STI Incidence per Person-Years using Poisson Regression was calculated.
  • Deferred Intervention Arm · Poisson Regression · p = 0.93 · Incidence rate: 32.01 · 95% CI 23.92 to 42.83Incidence Rate of any STI Incidence per Person-Years using Poisson Regression was calculated.
  • Immediate Intervention Arm vs Deferred Intervention Arm · Poisson Regression · p = 0.93 · Poisson regression: 31.74 · 95% CI 25.96 to 38.80Incidence Rate of any STI Incidence per Person-Years using Poisson Regression was calculated.
SecondaryIdentify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Uptake

PrEP uptake is defined as whether the participant initiated PrEP at the study clinic during the study cycle.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Uptake
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Uptake131137
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.08 · Odds ratio (or): 2.44 · 95% CI 0.89 to 6.69Estimates are for age group 26+ compared to 25 or less.
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.37 · Odds ratio (or): 0.38 · 95% CI 0.05 to 3.16Estimates are for comparison of highest level of education primary school vs. college.
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.04 · Odds ratio (or): 0.41 · 95% CI 0.17 to 0.98Estimates are for comparison of highest level of education high school vs. college
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.07 · Odds ratio (or): 2.21 · 95% CI 0.98 to 5.28Estimates are for comparison of physical violence yes vs. no
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Logistic · p = 0.97 · Odds ratio (or): 999.99 · 95% CI 0.001 to 999.99Estimates are for comparison of physical violence prefer not answer vs. no (not estimable)
SecondaryIdentify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Associated With PrEP Adherence Across Study Visits.

The number of study visits at which participants were highly adherent to PrEP, among those who initiated PrEP at the study clinic. High adherence at a given visit is determined using drug concentrations in dried blood spots (DBS): Truvada: TFV-DP ≥ 900 fmol/punch Descovy: TFV-DP ≥ 950 fmol/punch Arm-level results are presented as the total number of visits at which participants in each arm were highly adherent to PrEP, reported as the number and percentage of visits.

Time frame:
0-18 months
Reported as:
Count of units · Visits
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Associated With PrEP Adherence Across Study Visits.
VisitsImmediate Intervention ArmDeferred Intervention Arm
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Associated With PrEP Adherence Across Study Visits.291377
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · GEE · p = 0.8 · Odds ratio (or): 0.95 · 95% CI 0.64 to 1.40Estimates are for group emotional violence yes vs. no.
  • Immediate Intervention Arm vs Deferred Intervention Arm · GEE · p = 0.004 · Odds ratio (or): 2.57 · 95% CI 1.35 to 4.92Estimates are for group emotional violence prefer not to answer vs. no.
SecondaryIdentify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Persistence

PrEP persistence is defined as the proportion of study visits at which a participant demonstrates high adherence to PrEP among participants who initiated PrEP at the study clinic. High adherence at a given visit is determined using drug concentrations in dried blood spots (DBS): Truvada: TFV-DP ≥ 900 fmol/punch Descovy: TFV-DP ≥ 950 fmol/punch PrEP persistence reflects sustained high adherence across multiple visits over time per participant, rather than overall high adherence at all time points. For each participant, this proportion was converted to a percentage; arm-level results are presented as the mean of participant-level percentages in each arm in the outcome measure data table.

Time frame:
0-18 months
Reported as:
Mean · Percentage of Visits
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Persistence
Percentage of VisitsImmediate Intervention ArmDeferred Intervention Arm
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to PrEP Persistence41.7 ± 40.950.5 ± 43.2
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Linear · p = 0.08 · Mean difference (final values): -0.18 · 95% CI -0.39 to 0.02Estimates are for highest level of education primary school vs. college.
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Linear · p = 0.06 · Mean difference (final values): -0.11 · 95% CI -0.22 to 0.003Estimates are for highest level of education high school vs. college.
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Linear · p = 0.76 · Mean difference (final values): -0.016 · 95% CI -0.12 to 0.09
  • Immediate Intervention Arm vs Deferred Intervention Arm · Regression, Linear · p = 0.09 · Mean difference (final values): 0.36 · 95% CI -0.06 to 0.78
SecondaryIdentify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to Interest in Future HIV Research

An overall composite flag (Yes/No) for interest in future HIV research was created at the end of study using participant responses collected at enrollment, weeks 26, 52, and 78. Those who showed interest in future HIV research (Yes) were reported in the outcome measure data table.

Time frame:
0-18 months
Reported as:
Count of participants · Participants
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to Interest in Future HIV Research
ParticipantsImmediate Intervention ArmDeferred Intervention Arm
Identify Demographic, Behavioral, Socioeconomic, and Psychosocial Factors Related to Interest in Future HIV Research149153
Statistical analysis
  • Immediate Intervention Arm vs Deferred Intervention Arm ·

Adverse events

Collected over From enrollment until end of follow-up (0-18 months). Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Immediate Intervention Arm2/149 (1.3%)13/149 (8.7%)25/149 (16.8%)
Deferred Intervention Arm (0-6 Months)0/155 (0%)3/155 (1.9%)12/155 (7.7%)
Deferred Intervention Arm (6-18 Months)0/155 (0%)3/155 (1.9%)18/155 (11.6%)
Most frequent serious events
Showing 10 of 24
Most frequent serious events
EventImmediate Intervention ArmDeferred Intervention Arm (0-6 Months)Deferred Intervention Arm (6-18 Months)
Atrial fibrillationCardiac disorders1/1490/1550/155
Acute abdomenGastrointestinal disorders1/1490/1550/155
Gastrointestinal haemorrhageGastrointestinal disorders1/1490/1550/155
DeathGeneral disorders1/1490/1550/155
Multiple organ dysfunction syndromeGeneral disorders1/1490/1550/155
Hepatitis acuteHepatobiliary disorders1/1490/1550/155
HepatotoxicityHepatobiliary disorders1/1490/1550/155
DiverticulitisInfections and infestations1/1490/1550/155
Nosocomial infectionInfections and infestations1/1490/1550/155
Septic shockInfections and infestations1/1490/1550/155
Most frequent other events
Showing 10 of 22
Most frequent other events
EventImmediate Intervention ArmDeferred Intervention Arm (0-6 Months)Deferred Intervention Arm (6-18 Months)
Creatinine renal clearance decreasedInvestigations13/1495/15513/155
Blood creatinine increasedInvestigations5/1493/1555/155
Suicidal ideationPsychiatric disorders2/1490/1550/155
NauseaGastrointestinal disorders1/1492/1550/155
Blood pressure increasedInvestigations0/1490/1552/155
LymphopeniaBlood and lymphatic system disorders1/1490/1550/155
Abdominal discomfortGastrointestinal disorders1/1490/1550/155
Blood bilirubin increasedInvestigations1/1490/1550/155
Blood cholesterol increasedInvestigations1/1491/1550/155
Haemoglobin decreasedInvestigations1/1490/1551/155

Baseline characteristics

The analysis population is the same as the assignment in Participant Flow.

Age, Continuous
Age, Continuous(years)Immediate Intervention ArmDeferred Intervention ArmTotal
Mean30.3 ± 8.830.9 ± 8.830.6 ± 8.8
Age, Customized
Age, Customized(Participants)Immediate Intervention ArmDeferred Intervention ArmTotal
25 and below5747104
26 and above92108200
Sex/Gender, Customized
Sex/Gender, Customized(Participants)Immediate Intervention ArmDeferred Intervention ArmTotal
Gender — Missing011
Gender — Female282048
Gender — Transgender Female/Transgender Woman6576141
Gender — Gender nonbinary/Genderfluid/Gender Nonconforming3912
Gender — Another gender identity459
Gender — Prefer not to answer000
Gender — Multiple gender identities selected494493
Sex: Female, Male
Sex: Female, Male(Participants)Immediate Intervention ArmDeferred Intervention ArmTotal
Female000
Male149155304
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Immediate Intervention ArmDeferred Intervention ArmTotal
Hispanic or Latino8281163
Not Hispanic or Latino6272134
Unknown or Not Reported527
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Immediate Intervention ArmDeferred Intervention ArmTotal
American Indian or Alaska Native246
Asian279
Native Hawaiian or Other Pacific Islander101
Black or African American465096
White5354107
More than one race000
Unknown or Not Reported454085
08

Study locations

5 sites
  • Bridge HIV CRS
    San Francisco, California 94102, United States
  • Harlem Prevention Center CRS
    New York, New York 10027, United States
  • Penn Prevention CRS
    Philadelphia, Pennsylvania 19104, United States
  • Houston AIDS Research Team CRS
    Houston, Texas 77030, United States
  • Instituto de Pesquisa Clinicaq Evandro Chagas CRS
    Manguinhos, Rio de Janeiro 221045-900, Brazil
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 17, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04742491
Lead sponsor
HIV Prevention Trials Network
Collaborators
Gilead Sciences
Responsible party
Sponsor
First posted
Feb 8, 2021
Start date
Mar 26, 2021
Primary completion
Aug 16, 2024
Completion
Aug 16, 2024
Results posted
Dec 17, 2025
Last update
Dec 17, 2025

Study contacts

Tonia Poteat, PhD, MPH
study chair · UNC Chapel Hill

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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