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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Hypertens. 2015 May;33(5):1108–1113. doi: 10.1097/HJH.0000000000000503

Table 2.

Test properties of the 8-Item Morisky Medication Adherence Scale and the Visual Analog Scale compared with electronically measured adherence

Questionnaire, score Sensitivity,
% (95% CI)		 Specificity,
% (95% CI)		 LR+

(95% CI)		 LR−

(95% CI)
MMAS-8, <6 vs. 6-8 32 (21-44) 84 (76-92) 2.00 (1.10-3.65) 0.81 (0.66-0.98)
MMAS-8, <8 vs. 8 71 (60-82) 53 (42-63) 1.51 (1.15-1.98) 0.55 (0.35-0.85)
VAS, <80% vs. 80-100% 18 (8-27) 98 (95-100) 7.72 (1.77-33.6) 0.84 (0.75-0.95)
VAS, <100% vs. 100% 48 (36-62) 68 (58-78) 1.50 (1.01-2.24) 0.76 (0.57-1.01)

Abbreviations: MMAS-8, 8-Item Morisky Medication Adherence Scale; VAS, Visual Analog Scale; LR+, positive likelihood ratio; LR−, negative likelihood ratio; CI, confidence interval.