Table 2.

Performance of adherence measures detecting missed doses: Wisepill versus seven-day recall, pill count as standard. (N = 21)*

	Self-reported adherence	Wisepill adherence
Sensitivity (95% CI)	0% (0–70.8%)	100% (29.2–100%)
Specificity	100% (99.2–100%)	98.8% (97.3–99.6%)

*21 patients with 489 possible adherence events. For Wisepill: 3 true positives, 6 false positives, 0 false negatives, 480 true negatives. For self-report: 0 true positives, 0 false positives, 3 false negatives, 486 true negatives