“…27, 28, 32, 43, 47, 53, 55 The very limited existing studies with African Americans are cross-sectional (e.g., computed adherence for the past 24 hours) 38 and are based on self-reported measures of adherence. 2, 22, 38, 50 Studies in non-cancer settings, comparing self-reported measures of adherence with objective measures such as electronic monitoring, have found that subjective adherence measures are not sufficiently accurate and overestimate rates of adherence by 10%–30%. 3, 7, 10, 14, 19, 54 Thus, we compared analgesic adherence for cancer pain between African Americans and Whites longitudinally using Medication Event Monitoring System [MEMS TM ].…”