Table 3

Percentage of poor compliers and Cohen's kappa coefficients according to different cut-off points

Cut-off points

80%

85%

90%

95%


% Poor compliance

Taking compliance

3.4

3.4

4.8

14.4

Refill compliance

11.6

18.5

23.3

32.2

Cohen's kappa coefficient

-0.056

0.005

0.020

0.009


Wetzels et al. BMC Health Services Research 2006 6:8   doi:10.1186/1472-6963-6-8

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