Randomization
The biostatistician randomized the physicians within a practice to the intervention or wait-list control. Randomizing at the physician level minimized the risk of contamination in that all patients in that physician cluster received the intervention or the wait-list control. However, risk of contamination did remain as some of the patients within the same practice would receive the intervention while others the wait-list control. Despite that, we perceived this risk to be low based on our previous BETTER Trial experience.