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

> **NCT03772470** · NA · COMPLETED · sponsor: **Johns Hopkins Bloomberg School of Public Health** · enrollment: 4723 (actual)

## Conditions studied

- Surveys and Questionnaires
- Noncommunicable Diseases

## Interventions

- **OTHER:** 1X airtime incentive
- **OTHER:** 2X airtime incentive
- **OTHER:** Lottery airtime incentive

## Key facts

- **NCT ID:** NCT03772470
- **Lead sponsor:** Johns Hopkins Bloomberg School of Public Health
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2018-08-09
- **Primary completion:** 2018-11-13
- **Final completion:** 2018-11-13
- **Target enrollment:** 4723 (ACTUAL)
- **Last updated:** 2018-12-11

## Collaborators

- [object Object]
- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03772470

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03772470, "Use of Airtime Amounts to Improve Interactive Voice Response Surveys in Colombia and Tanzania". Retrieved via AI Analytics 2026-06-23 from https://api.ai-analytics.org/clinical/NCT03772470. Licensed CC0.

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