A Randomized Controlled Trial of Varying Airtime Amounts to Improve Interactive Voice Response (IVR) Survey Performance in Colombia and Tanzania
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 4,723
- 试验地点
- 2
- 主要终点
- Cooperation Rate #1
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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.
排除标准
- •Less than 18 years of age
研究组 & 干预措施
1X Incentive
1X airtime incentive
干预措施: 1X airtime incentive (Other)
2X incentive
2X airtime incentive
干预措施: 2X airtime incentive (Other)
Control
No airtime incentive was given for completing the survey
Lottery Incentive
Lottery airtime incentive given to one in 20 participants
干预措施: Lottery airtime incentive (Other)
结局指标
主要结局
Cooperation Rate #1
时间窗: 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
时间窗: 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
次要结局
- Refusal Rate #2(Through study completion, an average of one month)
- Contact Rate #2(Through study completion, an average of one month)