Critical to the success of the study is high quality data. Quality control procedures will happen in three stages of the study: during preparation for data collection, during the process of data collection, and after data collection is finished. Before starting data collection, study staff will have training sessions. During data collection, reports of summary statistics regarding questionnaire and visit data collection items are necessary to ensure form completion, appropriate use of skip logics and valid ranges. During and after the completion of data collection, data are quality controlled in real-time through the use of range limits and prompts for missing.

Timetable

Pilot study and Phases 1-2