Completed NA INTERVENTIONAL 4-arm NCT03772470

Use of Airtime Amounts to Improve Interactive Voice Response Surveys in Colombia and Tanzania

A Randomized Controlled Trial of Varying Airtime Amounts to Improve Interactive Voice Response (IVR) Survey Performance in Colombia and Tanzania

Sponsor: Ifakara Health Institute

Conditions Noncommunicable Diseases Surveys and Questionnaires

Interventions 1X airtime incentive 2X airtime incentive Lottery airtime incentive

Updated 5 times since 2019 Last updated: Dec 10, 2018 Started: Aug 9, 2018 Primary completion: Nov 13, 2018 Completion: Nov 13, 2018

This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This NA trial investigates Noncommunicable Diseases and Surveys and Questionnaires and is currently completed. Ifakara Health Institute leads this study, which shows 5 recorded versions since 2018 — indicating limited longitudinal coverage. The change history captured here reflects the iterative nature of clinical trial conduct.

Status Flow

Change History

5 versions recorded

Sep 2025 — Present [monthly]

Completed NA
Sep 2024 — Sep 2025 [monthly]

Completed NA
Jul 2024 — Sep 2024 [monthly]

Completed NA
Jan 2021 — Jul 2024 [monthly]

Completed NA
Jan 2019 — Jan 2021 [monthly]

Completed NA

First recorded

Aug 2018

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:

Ifakara Health Institute
Johns Hopkins Bloomberg School of Public Health
Pontificia Universidad Javeriana
The Bloomberg Family Foundation, Inc.

Data source: Johns Hopkins Bloomberg School of Public Health

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

• Bogotá, Colombia
• Dar es Salaam, Tanzania