Measures
EVENT
We used the Medication Event Monitoring System (MEMS) electronic pill box (AARDEX) to measure adherence. We calculated monthly mean adherence as the percentage of days participants opened the box once or twice (depending on the regimen). We treated adherence of less than 10% as missing, assuming participants did not use their MEMS device. We assessed self-reported baseline adherence according to 30-day recall. eMethods in Research assistants administered the SSQ-14