ClinicalTrials.gg
RecruitingNCT04158895GREATUpdated Nov 17, 2025

Gathering Records to Evaluate Antiretroviral Treatment-Malawi ( GREAT )

An observational study in HIV, sponsored by Boston University. Recruiting at 1 site in Malawi. Open to participants aged 15 Years and older. Per ClinicalTrials.gov, last updated 2025-11-17.

Sponsored by Boston University · Observational

From the registry’s dates

  • Started Dec 2019; still recruiting 6 years 11 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
1,000,000
Ages
15 Years and older
Sex
All
01

Study summary

To achieve global goals for the treatment of HIV, most high-prevalence countries are experimenting with and scaling up differentiated service delivery models (DSD). A handful of efforts have been formally described and evaluated in the literature; many others are being implemented formally or informally under routine care, without a research or evaluation goal. For most countries, however, we have little evidence on the big picture-the proportion of clinics offering alternative models, eligibility criteria and the proportion of patients considered eligible, the number of patients actually participating, health outcomes such as viral suppression, empirical resource utilization compared to traditional care, variations among the models, duration of patient participation, fidelity to model guidelines, effects on clinic efficiency, and sustainability without external donor support.

AMBIT is a set of data synthesis, data collection, and data analysis activities aimed at generating information for near- and long-term decision making and creating an approach and platform for ongoing evaluation of differentiated models of HIV treatment delivery in the future. The project will collect and analyze a wide range of existing data sets pertinent to DSD. This protocol is for an analysis of existing medical record data collected by the Ministry of Health, implementing partners, and other completed, ongoing, or new evaluations, trials, and observational studies. Outcomes to be reported include coverage/uptake of DSD, patients' outcomes, and distribution of each model. There will be no study interaction with individual patients, providers, caregivers, or others for this analysis.

02

Conditions studied

  • HIV

Keywords

  • HIV
  • Malawi
  • Differentiated service delivery
  • Antiretroviral therapy
03

In context

Lead sponsor

Boston University is the lead sponsor of 270 studies on the registry; 36 are open to participants now.

Of its 31 completed or terminated interventional studies of FDA-regulated products, 24 (77%) have results posted.

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

04

Who can participate

Ages eligible
15 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

All adults who are accessing care for HIV anywhere in the country.

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

  • ≥ 15 years old
  • Patients accessing care for within the data collection period
  • In any HIV transmission risk group

Exclusion criteria

Exclusion Criteria:

  • None
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.

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.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
1,000,000 participants (estimated)
Patient registry
No

Groups and cohorts

  • Patients enrolled in differentiated service delivery models

    Other: Routine medical record data collection

  • Patients not enrolled in DSD models

    Other: Routine medical record data collection

Interventions

  • OtherRoutine medical record data collection

    The study will collect routine medical record data from the electronic medical record system, other electronic databases, and paper charts.

06

What researchers measure

Primary outcomes

  1. Patient-months enrolled in any DSD model

    % of all patient-months of ART provided for the cohort that are provided within DSD models

    Time frame: 12 months

  2. Patient-months enrolled in any DSD model

    % of all patient-months of ART provided for the cohort that are provided within DSD models

    Time frame: 24 months

  3. Patient-months enrolled in any DSD model

    % of all patient-months of ART provided for the cohort that are provided within DSD models

    Time frame: 6 months

07

Study locations

1 of 1 sites recruiting
  • All clinics
    Lilongwe, Malawi
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Dec 2019 (actual). Primary completion is estimated for Dec 2026, 84 months after the start.

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

Registered
Nov 7, 2019
First posted
Nov 12, 2019
StartActual
Dec 1, 2019
Primary completionEst.
Dec 31, 2026
CompletionEst.
Dec 31, 2027
Last update
Nov 17, 2025
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 Nov 17, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04158895
Lead sponsor
Boston University
Collaborators
Bill and Melinda Gates Foundation, University of Witwatersrand, South Africa, Clinton Health Access Initiative Inc.
Responsible party
Sponsor
First posted
Nov 12, 2019
Start date
Dec 1, 2019
Primary completion
Dec 31, 2026 (estimated)
Completion
Dec 31, 2027 (estimated)
Last update
Nov 17, 2025

Study contacts

Sydney B Rosen
Contact
sbrosen@bu.edu
6173582251
Lawrence Long
Contact
lclong@bu.edu
6173583122
Sydney B Rosen
study director · Boston University School of Pubic Health

Oversight

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

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