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

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 4,723 (actual)
• Sponsor: Johns Hopkins Bloomberg School of Public Health · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

This study evaluates the effect of three different airtime incentive amounts on interactive voice response (IVR) survey cooperation, response, refusal and contact rates, as compared to control group, in Colombia and Tanzania.

Detailed description

Using random digit dialing (RDD) sampling technique, participants were randomized one of four airtime incentive amounts contingent on them completing the noncommunicable disease risk factor survey. This mobile phone survey will be sent as an interactive voice response (IVR). In IVR surveys, participants use their touch tone key pad to answer pre-recorded questions. (i.e. If you are male, pres 1; If you are female, press 2). This study will be conducted in both Colombia and Tanzania.

Conditions

• Surveys and Questionnaires
• Noncommunicable Diseases

Interventions

Type	Name	Description
OTHER	1X airtime incentive	An incentive given in the form of airtime
OTHER	2X airtime incentive	An incentive given in the form of airtime
OTHER	Lottery airtime incentive	An incentive given in the form of airtime

Timeline

• Start date: 2018-08-09
• Primary completion: 2018-11-13
• Completion: 2018-11-13
• First posted: 2018-12-11
• Last updated: 2018-12-11

Locations

2 sites across 2 countries: Colombia, Tanzania