Table 2

Cross-tabulation of self-reported versus actual adherence1

Actual Adherence2


Self-Reported Adherance

Cell counts (%)

<1 Day/Week

≥ 1 Day /Week

Row Totals (%)


<1 Day/Week

147 (51.4)

78 (27.3)

225 (78.7)

≥ 1 Day/Week

18 (6.3)

43 (15.0)

61 (21.3)

Column Totals (%)

165 (57.7)

121 (42.3)

286 (100.0)


1Adherence defined as number of days when 1 or more doses were missed 2Electronically measured using MEMS-4

Choo et al. BMC Cardiovascular Disorders 2001 1:6   doi:10.1186/1471-2261-1-6

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