1. Describe the study design you will employ in order to determine if your intervention has had an effect on the outcome variable of interest.
I will be conducting a randomized controlled trial as this is the highest standard to test any clinical intervention. My intervention is simple and implemented at the individual level so I do not need to engage multiple institutions or sites. I can randomize patients within the controlled setting of the clinic, but I will come across issues of contamination if patients talk to each other and show each other messages.
2. Define the unit-of-analysis for your main outcome evaluation, the minimum meaningful effect size, and the sample size necessary to detect this effect size.
I will be looking at the patient level for the unit of analysis. I have found a couple of stuides looking at interventions to promote continuation of family planning and other studies that look at mobile phone interventions to spread health education. I have found that the effect size that I expect is between 15-25%. This leads to a very wide spread for sample sizes, but to be conservation the number I need to enroll will be 150 per arm.