ClinicalTrials.gg
CompletedNCT02464410POSTUpdated Jul 27, 2023Results posted

Primary Care Intervention to Reduce Prescription Opioid Overdoses

An interventional study of Motivational intervention and Psycho-educational control in Pain, Drug Overdose and Opioid Use Disorders, sponsored by VA Office of Research and Development. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-07-27.

Sponsored by VA Office of Research and Development · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
299
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 48 studies in Pain by VA Office of Research and Development — 13 open to participants now, 15 under way, 1 of them phase 3. Pain · VA Office of Research and Development.

Enrollment
7th of 46
299 · median 194
Started
2016
with 1 other
No phase
36 of 48
9 open now
Registered
18th of 48
by date

Among the 48 studies in Pain by VA Office of Research and Development, this one is the 7th largest by enrollment of the 46 interventional ones that give a count, is one of 2 that started in 2016, is one of 36 with no phase, and was the 18th registered.

Pain

10,054 studies on the registry are indexed under Pain; 1,649 are open to participants now.

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Open to participants now

13 of the 48 studies in Pain by VA Office of Research and Development are open now, in 1 country. Recruiting first, the newest first:

8 more — sign in →

By country, each count listing its studies:

All 13 open studies →

Where they have run

Who these studies take

Of the 929 Pain studies recruiting now, 384 (41%) set no upper age limit and 434 (47%) stop at 75 or younger; 146 take children under 18; 222 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 48 studies in Pain by VA Office of Research and Development, or all of them as a file.
02

Study summary

The high rate of adverse events, including overdose, resulting from opioid pain medication use threatens the quality and safety of pain care in the Veterans Health Administration (VHA) and elsewhere and is a critical public health problem in the United States. Pain is a highly common condition among VHA patients, and opioid therapy constitutes a primary mode of pain treatment.

This study seeks to address this issue by conducting a randomized controlled trial of a brief conversation to improve opioid safety among Veteran patients receiving long-term opioid therapy. Veterans receiving opioid therapy for pain in primary care will be recruited and randomized to receive either a single session motivational intervention focused on safe opioid use or an equal attention control condition. The primary hypothesis is that the motivational intervention will improve opioid safety, decrease risk behaviors, aberrant opioid use, and total quantities of opioids prescribed relative to the control condition. Study findings will inform efforts to ensure the safety and well-being of Veteran patients with pain.

Read the detailed description

Adverse outcomes, including overdose, related to opioid use have increased and represent a significant threat to the safety and quality of VHA pain care as well as a national public health concern. Efforts are underway to change opioid prescribing behavior, but concurrent strategies are needed to address patient behaviors that decrease opioid safety and thus increase opioid overdose risk. Overdoses result from a range of behaviors, including taking more than prescribed, using multiple substances with synergistic effects, and injecting/snorting crushed pills to get high. Factors such as having a mental health condition have been found to increase risk of overdose among Veterans receiving opioids for pain. Given the range of risk behaviors and relevant patient factors, tailored opioid risk reduction strategies are urgently needed. Motivational enhancement (ME) is an evidence-based strategy that uses tailoring to enact behavior change through improving self-efficacy and motivation. Recent VHA initiatives to increase behavioral health providers in primary care, such as Primary Care-Mental Health Integration (PC-MHI), provide a clear opportunity to deliver ME interventions to the many patients treated for long-term pain in primary care. Although the impact of ME on overdose risk behavior is unknown, the use of an ME approach to improve opioid safety and reduce risk behaviors is potentially well-suited to the context of long-term opioid pain care, when total and immediate discontinuation of opioid use is often unfeasible.

The proposed Prescription Opioid Safety Trial (POST) study will be a randomized controlled trial of a brief, tailored ME conversation that incorporates cognitive behavioral strategies to increase pain coping and is aimed at improving patients' opioid safety. The study will recruit 450 patients from primary care clinics at the VA Ann Arbor Healthcare System. Patients with long-term opioid use, defined as treatment for at least 84 days covered within the last 90 days, who are prescribed opioid doses of 20 morphine-equivalent mg/day or greater (an indicator of overdose risk) will be screened and recruited into the study. Participants will then be randomized to either the intervention (n = 225) or an enhanced usual care (EUC) condition (n = 225). Pharmacy records and patient self-report will be assessed at baseline and 3-, 6-, and 12-month follow-ups to measure key outcomes.

The specific aims are:

Aim 1) to examine if patients randomly assigned to a brief opioid safety intervention report reduced overdose risk behaviors (e.g., higher dose, concurrent alcohol use, concurrent other drug/medication use, returning to normal dose after breaks in use) over one year of follow-up compared to patients assigned to equal attention EUC.

Aim 2) to examine if patients randomly assigned to a brief opioid safety intervention have lower total quantities of opioids prescribed (from pharmacy fill records) and aberrant opioid use (e.g., using for reasons other than pain, obtaining opioids from someone other than primary provider) over one year of follow-up compared to patients assigned to equal attention EUC.

The study has two secondary aims: 1) to examine if patients randomly assigned to the brief intervention have fewer non-fatal overdoses and other medication-related adverse events (emergency department visits, over-sedation, injuries), better functioning, and more often store and dispose of opioids safely compared to patients assigned to EUC; and 2) to examine mediators (motivation and self-efficacy) and moderators (OIF/OEF/OND status, baseline mental health) of intervention effects.

03

Conditions studied

  • Pain
  • Drug Overdose
  • Opioid Use Disorders

Keywords

  • Opioid analgesics
  • Primary care
  • Veterans
  • Motivational interviewing
  • Cognitive behavioral therapy
  • Self-efficacy
  • Behavioral symptoms
  • Injuries
  • Opioid Safety
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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

  • Patient at the Ann Arbor VA Medical Center receiving treatment in a primary care clinic
  • Currently prescribed 20 morphine-equivalent mg (MEM) per day or more of an opioid
  • Received opioid therapy for at least 90 days
  • 18 years of age or older

Exclusion criteria

Exclusion Criteria:

  • Plans to stop opioids or reduce dose to below 20 MEM/day in the next 6 months
  • Use of fentanyl, due to the difficulty in determining morphine equivalency
  • A terminal cancer diagnosis
  • Acute suicidality requiring immediate treatment
  • Moderately severe cognitive impairment
  • Inability to give
Terms in these criteria, in plain language(1)

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.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
299 participants (actual)

Study arms

  • Experimental
    Motivational Intervention

    The intervention session combines elements of motivational enhancement (ME) and cognitive behavioral therapy (CBT) and uses the structure of ME brief interventions. The motivational session is overlaid on the VA long-term opioid therapy informed consent process.

    Behavioral: Motivational intervention · Other: Long-term opioid therapy informed consent

  • Active comparator
    Enhanced Usual Care

    In addition to covering the VHA's long-term OA informed consent process, the enhanced usual care (EUC) condition provides educational content related to the biology of pain response and an overview of pain conditions. The overall style is didactic. This EUC condition will include some information related to risks of opioid use as part of the informed consent and will consequently have sufficient face validity as an intervention on opioid safety to effectively blind participant to randomization. However, the EUC therapist will not use the motivational enhancement approach of discussing strategies for avoiding these risks. It is designed to be equal in length to the motivational intervention.

    Behavioral: Psycho-educational control · Other: Long-term opioid therapy informed consent

Interventions

  • BehavioralMotivational intervention

    The intervention session combines elements of motivational enhancement (ME) and cognitive behavioral therapy (CBT). Similar to other ME brief interventions, the intervention content will be covered in a single session. Participants are presented with a variety of risk reduction strategies and strategies for coping with pain that may reduce reliance on opioids for managing pain.

  • BehavioralPsycho-educational control

    The educational control condition provides educational content related to the biology of pain response and an overview of pain conditions. The overall style is didactic.

  • OtherLong-term opioid therapy informed consent

    The Veterans Health Administration instituted a requirement that all patients receiving long-term opioid therapy receive an informed consent process that reviews the risks of opioid therapy. All individuals eligible for this study will meet this definition of long-term opioid therapy. The study therapists for both study arms will deliver the informed consent process during the sessions as part of treatment as usual.

06

What researchers measure

Primary outcomes

  1. Overdose Risk Behaviors

    This scale is a total sum of 9 items assessing participant's self-report of engaging in behavior that increases risk for overdose. Higher scores indicate greater risk for overdose. The range for this measure is 0 to 9 in one assessment.

    Time frame: 3-, 6-, and 12-months post-baseline

  2. Aberrant Opioid Use

    This measure contained 8 self-reported items from the Current Opioid Misuse Measure. Items were assessed on a scale of "never (0)," "rarely (1)," "sometimes (2)," "often (3)," and "very often (4)." A sum score took a range of 0 to 32, with higher numbers indicating more non-medical opioid use.

    Time frame: 3-, 6-, and 12-months post-baseline

  3. Average Number of Days Prescribed Opioid Use Based on Pharmacy Records

    Number of days prescribed opioid use was pulled from pharmacy records. For follow-up periods, times no dose were included to create averages over periods. Patients without medications during their follow-up period were included with a dose of zero.

    Time frame: 3-, 6-, and 12-months post-baseline

Secondary outcomes

  1. Number of Participants With Non-fatal Overdose Experiences

    This scale is the number of overdose experiences as self-reported in the Overdose Experiences questionnaire. This item is a number of participants whom endorsed having experienced an overdose at that time period.

    Time frame: 3-, 6-, and 12-months post-baseline

  2. Treatment Utilization

    Number of visits to the emergency department, for medical, mental health or substance use visits, across VA and non-VA hospitals from the Treatment Service Utilization Questionnaire. The numbers reported are the mean number of visits among those participants that had any emergency department visits at each time point.

    Time frame: 3-, 6-, and 12-months post-baseline

  3. Other (Non-overdose) Injuries From the Revised Injury Behavior Checklist Questionnaire

    This scale is the number of non-overdose injuries assessed through the Revised Injury Behavior Checklist questionnaire, focusing on 4 topics (Injury 1. by violence or by being physically attacked; 2. By falling; 3. By a motor vehicle or by being hit by a moving vehicle while walking; 4. While riding a bicycle, skateboard, or rollerblading). This item is a count of participants who responded that they were injured during any of these types of activities and received treatment.

    Time frame: 3-, 6-, and 12-months post-baseline

  4. Scores on an Opioid Storage and Disposal Knowledge and Behaviors Questionnaire

    This scale assesses safe storage and disposal of prescription opioid medications with 6 items. Items were assessed on a scale of "never (0)," "rarely (1)," "sometimes (2)," "often (3)," and "very often (4)." A sum score took a range of 0 to 24, with higher numbers indicating less safe practices. The sum of the score of the 6 items was used to find the mean scores for those in each arm.

    Time frame: 3-, 6-, and 12-months post-baseline

  5. Level of Oversedation as an Opioid Side Effect

    The level of oversedation as an opioid side effect was assessed using two items from the Pain Treatment Satisfaction Scale looking at side effects of opioid medications (excessive fatigue and drowsiness). Items were assessed on a scale of 0 (did not experience) to 5 (extremely bothered). A sum score ranged from 0 to 10 with a higher score indicating the potential for more oversedation.

    Time frame: 3-, 6-, and 12-months post-baseline

  6. General Physical and Mental Functioning From Short Form-12 Questionnaire Scores

    A modified Veterans RAND 12-item health survey was used to assess general health. One item was scored from 1 (Excellent) to 5 (Poor). Score means were compared at baseline and each follow-up.

    Time frame: 3-, 6-, and 12-months post-baseline

  7. Pain-specific Disability Score From an Adapted Version of Brief Pain Inventory Questionnaire

    This scale is a sub-section of the Brief Pain Inventory that assesses the impact of pain on functioning across 7 different activities. Activities are assessed on a Likert scale from "Does not interfere (0)" to "Completely interferes (10)". BPI pain interference was scored as the mean of the seven interference items, scores range from 0 to 10, with a mean score of 10 (maximum score) indicating a complete interference in all activities.

    Time frame: 3-, 6-, and 12-months post-baseline

07

Results

Posted Sep 2, 2022
Limitations and caveats
During the course of this project, the VA changed their opioid prescribing practices in response to the Opioid Safety Initiative. This changed the potential participants for this study (patients prescribed more than 50 MEM), so we updated our enrollment criteria to 20 MEM. We still did not meet our enrollment goal as we had reached saturation of the potential participant pool of patients in primary care at the local VA hospital. At the same time, our overall retention rate is 87.3%.

Participant flow

Participant flow — Overall Study
MilestoneMotivational InterventionEnhanced Usual Care
Started147152
3-month follow-up137138
6-month follow-up132140
12-month follow-up125136
Completed125136
Not completed2216
Withdrew: Death34
Withdrew: Lost to follow-up79
Withdrew: Withdrawal by subject123

Outcome measures

PrimaryOverdose Risk Behaviors

This scale is a total sum of 9 items assessing participant's self-report of engaging in behavior that increases risk for overdose. Higher scores indicate greater risk for overdose. The range for this measure is 0 to 9 in one assessment.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
Overdose Risk Behaviors
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up1.31 ± 1.141.21 ± 1.09
6-Month Follow-up1.45 ± 1.201.25 ± 1.29
12-Month Follow-up1.38 ± 1.291.07 ± 1.05
PrimaryAberrant Opioid Use

This measure contained 8 self-reported items from the Current Opioid Misuse Measure. Items were assessed on a scale of "never (0)," "rarely (1)," "sometimes (2)," "often (3)," and "very often (4)." A sum score took a range of 0 to 32, with higher numbers indicating more non-medical opioid use.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
Aberrant Opioid Use
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up2.95 ± 3.042.51 ± 2.74
6-Month Follow-up2.87 ± 3.062.68 ± 3.11
12-Month Follow-up2.80 ± 3.082.73 ± 3.35
PrimaryAverage Number of Days Prescribed Opioid Use Based on Pharmacy Records

Number of days prescribed opioid use was pulled from pharmacy records. For follow-up periods, times no dose were included to create averages over periods. Patients without medications during their follow-up period were included with a dose of zero.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · Days of Prescribed Opioid Use
Average Number of Days Prescribed Opioid Use Based on Pharmacy Records
Days of Prescribed Opioid UseMotivational InterventionEnhanced Usual Care
3-Month Follow-up48.23 ± 38.9745.81 ± 41.06
6-Month Follow-up44.75 ± 38.7042.54 ± 41.08
12-Month Follow-up42.19 ± 38.9237.56 ± 38.83
SecondaryNumber of Participants With Non-fatal Overdose Experiences

This scale is the number of overdose experiences as self-reported in the Overdose Experiences questionnaire. This item is a number of participants whom endorsed having experienced an overdose at that time period.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Number · participants with OD
Number of Participants With Non-fatal Overdose Experiences
participants with ODMotivational InterventionEnhanced Usual Care
3-Month Follow-up10
6-Month Follow-up21
12-Month Follow-up01
SecondaryTreatment Utilization

Number of visits to the emergency department, for medical, mental health or substance use visits, across VA and non-VA hospitals from the Treatment Service Utilization Questionnaire. The numbers reported are the mean number of visits among those participants that had any emergency department visits at each time point.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · Visits to the Emergency Dept
Treatment Utilization
Visits to the Emergency DeptMotivational InterventionEnhanced Usual Care
3-Month Follow-up1.50 ± 0.841.81 ± 1.24
6-Month Follow-up1.61 ± 1.772.11 ± 2.31
12-Month Follow-up2.20 ± 3.272.04 ± 1.85
SecondaryOther (Non-overdose) Injuries From the Revised Injury Behavior Checklist Questionnaire

This scale is the number of non-overdose injuries assessed through the Revised Injury Behavior Checklist questionnaire, focusing on 4 topics (Injury 1. by violence or by being physically attacked; 2. By falling; 3. By a motor vehicle or by being hit by a moving vehicle while walking; 4. While riding a bicycle, skateboard, or rollerblading). This item is a count of participants who responded that they were injured during any of these types of activities and received treatment.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Count of participants · Participants
Other (Non-overdose) Injuries From the Revised Injury Behavior Checklist Questionnaire
ParticipantsMotivational InterventionEnhanced Usual Care
3-Month Follow-up54
6-Month Follow-up45
12-Month Follow-up114
SecondaryScores on an Opioid Storage and Disposal Knowledge and Behaviors Questionnaire

This scale assesses safe storage and disposal of prescription opioid medications with 6 items. Items were assessed on a scale of "never (0)," "rarely (1)," "sometimes (2)," "often (3)," and "very often (4)." A sum score took a range of 0 to 24, with higher numbers indicating less safe practices. The sum of the score of the 6 items was used to find the mean scores for those in each arm.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
Scores on an Opioid Storage and Disposal Knowledge and Behaviors Questionnaire
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up0.95 ± 1.470.68 ± 1.28
6-Month Follow-up1.07 ± 1.630.69 ± 1.37
12-Month Follow-up1.13 ± 1.820.76 ± 1.45
SecondaryLevel of Oversedation as an Opioid Side Effect

The level of oversedation as an opioid side effect was assessed using two items from the Pain Treatment Satisfaction Scale looking at side effects of opioid medications (excessive fatigue and drowsiness). Items were assessed on a scale of 0 (did not experience) to 5 (extremely bothered). A sum score ranged from 0 to 10 with a higher score indicating the potential for more oversedation.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
Level of Oversedation as an Opioid Side Effect
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up1.66 ± 2.201.96 ± 2.59
6-Month Follow-up1.57 ± 2.052.08 ± 2.55
12-Month Follow-up2.36 ± 2.462.25 ± 2.59
SecondaryGeneral Physical and Mental Functioning From Short Form-12 Questionnaire Scores

A modified Veterans RAND 12-item health survey was used to assess general health. One item was scored from 1 (Excellent) to 5 (Poor). Score means were compared at baseline and each follow-up.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
General Physical and Mental Functioning From Short Form-12 Questionnaire Scores
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up3.57 ± 0.893.70 ± 0.95
6-Month Follow-up3.63 ± 0.943.76 ± 0.99
12-Month Follow-up3.71 ± 0.813.79 ± 0.93
SecondaryPain-specific Disability Score From an Adapted Version of Brief Pain Inventory Questionnaire

This scale is a sub-section of the Brief Pain Inventory that assesses the impact of pain on functioning across 7 different activities. Activities are assessed on a Likert scale from "Does not interfere (0)" to "Completely interferes (10)". BPI pain interference was scored as the mean of the seven interference items, scores range from 0 to 10, with a mean score of 10 (maximum score) indicating a complete interference in all activities.

Time frame:
3-, 6-, and 12-months post-baseline
Reported as:
Mean · score on a scale
Pain-specific Disability Score From an Adapted Version of Brief Pain Inventory Questionnaire
score on a scaleMotivational InterventionEnhanced Usual Care
3-Month Follow-up4.86 ± 2.875.10 ± 4.64
6-Month Follow-up4.89 ± 2.665.16 ± 2.88
12-Month Follow-up4.89 ± 4.405.41 ± 2.51

Adverse events

Collected over Collected over 12 months post-baseline assessment. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Motivational Intervention3/147 (2%)0/147 (0%)0/147 (0%)
Enhanced Usual Care4/152 (2.6%)0/152 (0%)0/152 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Motivational InterventionEnhanced Usual CareTotal
<=18 years000
Between 18 and 65 years6887155
>=65 years7965144
Sex: Female, Male
Sex: Female, Male(Participants)Motivational InterventionEnhanced Usual CareTotal
Female15823
Male132144276
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Motivational InterventionEnhanced Usual CareTotal
Hispanic or Latino628
Not Hispanic or Latino141150291
Unknown or Not Reported000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Motivational InterventionEnhanced Usual CareTotal
American Indian or Alaska Native145
Asian011
Native Hawaiian or Other Pacific Islander000
Black or African American111223
White125125250
More than one race6612
Unknown or Not Reported448
Region of Enrollment
Region of Enrollment(Participants)Motivational InterventionEnhanced Usual CareTotal
United States147152299
Overdose risk behaviors
Overdose risk behaviors(units on a scale)Motivational InterventionEnhanced Usual CareTotal
Mean1.63 ± 1.161.75 ± 1.261.69 ± 1.21
Aberrant opioid use
Aberrant opioid use(units on a scale)Motivational InterventionEnhanced Usual CareTotal
Mean4.16 ± 3.583.77 ± 3.433.96 ± 3.51
Average number of days prescribed opioid use based on pharmacy records
Average number of days prescribed opioid use based on pharmacy records(Days of Prescribed Opioid Use)Motivational InterventionEnhanced Usual CareTotal
Mean51.57 ± 39.7547.54 ± 38.9649.52 ± 39.34

7 further baseline measures are reported on the registry.

08

Study locations

1 site
  • VA Ann Arbor Healthcare System, Ann Arbor, MI
    Ann Arbor, Michigan 48105-2303, United States
09

References and documents

Publications

  • Humphreys K, Shover CL, Andrews CM, Bohnert ASB, Brandeau ML, Caulkins JP, Chen JH, Cuellar MF, Hurd YL, Juurlink DN, Koh HK, Krebs EE, Lembke A, Mackey SC, Larrimore Ouellette L, Suffoletto B, Timko C. Responding to the opioid crisis in North America and beyond: recommendations of the Stanford-Lancet Commission. Lancet. 2022 Feb 5;399(10324):555-604. doi: 10.1016/S0140-6736(21)02252-2. Epub 2022 Feb 2. No abstract available. PubMed 35122753 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Aug 2016 to primary completion in Oct 2020, 49 months.

Results were first posted in Sep 2022, 1 year 11 months after primary completion.

Of 3,731 non-industry interventional studies with no phase under Pain, half reached primary completion within 10 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 23. This study's 49 months is above that.

Counting every sponsor, half of 3,830 studies reached it within 10 months; a quarter within 4 and three quarters within 23.

How these figures are worked out, and which studies are left out of them.

Registered
May 21, 2015
First posted
Jun 8, 2015
StartActual
Aug 4, 2016
Primary completionActual
Oct 1, 2020
CompletionActual
Mar 31, 2021
Results first posted
Sep 2, 2022
Last update
Jul 27, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 27, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02464410
Responsible party
Sponsor
First posted
Jun 8, 2015
Start date
Aug 4, 2016
Primary completion
Oct 1, 2020
Completion
Mar 31, 2021
Results posted
Sep 2, 2022
Last update
Jul 27, 2023

Study contacts

Amy S Bohnert, PhD MHS BA
principal investigator · VA Ann Arbor Healthcare System, Ann Arbor, MI

Oversight

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

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