Hi there. Collecting questionnaires is really expensive and time-consuming. For NGO staff, it is also very difficult since we have less solid research knowledge. Therefore, I am considering use second-hand data. However, I also found that reliable sources of data on patient behavior (e.g., physical activity or diet) are less available. Could you please help me with this struggle?

No problem.

Thank you for the detailed reply.

Sure. Most of these measures rely on pharmacy data or patient self-report. If the use of pharmacy data is feasible, then it is sensible to use these data for evaluating the program's effect on patients' medication behavior. Administrative data might provide a similar source of data on clinic visit behavior, although attention should be given to the extent of the time lag evident in the data reporting.