Use of Airtime Amounts to Improve Interactive Voice Response Surveys in Colombia and Tanzania
- Conditions
- Noncommunicable DiseasesSurveys and Questionnaires
- Registration Number
- NCT03772470
- Lead Sponsor
- Johns Hopkins Bloomberg School of Public Health
- Brief 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.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 4723
- Access to a mobile phone
- Greater or equal to 18 years of age
- In Colombia, conversant in the Spanish language. In Tanzania, conversant in the Swahili language.
- Less than 18 years of age
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Primary Outcome Measures
Name Time Method Cooperation Rate #1 Through study completion, an average of one month As defined by American Association for Public Opinion Research, cooperation rate is defined as I/(I+P+R) where I is complete interviews, P is partial interviews, and R is refusals and breakoffs.
Response Rate #4 Through study completion, an average of one month As defined by American Association for Public Opinion Research, response rate is defined as (I+P)/(I+P+R+eU) where I is complete interviews, P is partial interviews, R is refusals and breakoffs, and eU is the estimated eligible proportion of unknowns
- Secondary Outcome Measures
Name Time Method Refusal Rate #2 Through study completion, an average of one month As defined by American Association for Public Opinion Research, refusal rate is defined as (R)/(I+P+R+eU) where R is refusals and breakoffs, I is complete interviews, P is partial interviews, and eU is the estimated eligible proportion of unknowns
Contact Rate #2 Through study completion, an average of one month As defined by American Association for Public Opinion Research, contact rate is defined as (I+P+R)/(I+P+R+eU) where I is complete interviews, P is partial interviews, R is refusals and breakoffs, and eU is the estimated eligible proportion of unknowns
Trial Locations
- Locations (2)
Instituto de Salud Publica Pontificia Universidad Javeriana
🇨🇴Bogota, D.c., Colombia
Ifakara Health Institute
🇹🇿Dar Es Salaam, Tanzania
Instituto de Salud Publica Pontificia Universidad Javeriana🇨🇴Bogota, D.c., Colombia