Table 2.

Kappa statistics of agreement for classifying adherence as perfect (highest response option) versus imperfect (all other response options)^*

	RATING	FREQ	PERCENT	VAS
RATING	1.00	--	--	--
FREQ	0.56 (0.34-0.79)	1.00	--	--
PERCENT	0.74 (0.52-0.95)	0.70 (0.50-0.90)	1.00	--
VAS	0.67 (0.45-0.89)	0.62 (0.40-0.84)	0.63 (0.39-0.86)	1.00
CPCRA	0.34 (0.17-0.52)	0.53 (0.32-0.73)	0.37 (0.19-0.56)	0.49 (0.29-0.68)

^*Data in parentheses represent the 95% confidence interval

FREQ Frequency; VAS Visual analog scale; CPCRA Community Programs for Clinical Research on AIDS