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Table 3 Impact of window length on measurement properties

From: Comparison of pharmacy-based measures of medication adherence

Measure of Medication Aquisition Duration of Observation Window
3 months 6 months 9 months 12 months 15 months
CMA4 0.68 ± 0.30 (6094) 0.58 ± 0.32 (5545) 0.54 ± 0.32 (4915) 0.53 ± 0.31 (4045) 0.54 ± 0.31 (2694)
CMA6 0.65 ± 0.29 (6094) 0.53 ± 0.29 (5545) 0.50 ± 0.29 (4915) 0.50 ± 0.29 (4045) 0.51 ± 0.29 (2694)
CMA7 0.42 ± 0.33 (6436) 0.41 ± 0.30 (6185) 0.41 ± 0.29 (5855) 0.40 ± 0.29 (5355) 0.40 ± 0.29 (4485)
CMA8 0.35 ± 0.35 (6436) 0.38 ± 0.31 (6185) 0.39 ± 0.30 (5855) 0.39 ± 0.29 (5355) 0.39 ± 0.29 (4485)
  1. Data expressed as mean ± SD (sample size in parentheses).