Table 3.

Attitude toward treatment adherence as a proxy measurement of Treatment adherence with pill count as gold standard.

ATTITUDES TOWARD TREATMENT ADHERENCE	TREATMENT ADHERENCE
	Good	Poor
Positive	63	144	207
Negative	47	153	200
	110	297	407

Sensitivity (95% CI): 57.2% (47.4–66.6)

Specificity (95% CI): 51.5% (45.6–57.3)

Positive predictive value (95% CI): 30.4% (24.2–37.1)

Negative predictive value (95% CI): 76.5% (70.0–82.1)

Positive likelihood ratio (95% CI): 1.18 (0.97–1.44)

Negative likelihood ratio (95% CI): 0.83 (0.65–1.06)

Pre-test odds (95% CI): 0.36 (0.28–0.44)

Positive post-test odds (95% CI): 0.42 (0.27–0.63)

Positive post-test probability (95% CI): 0.29 (0.21–0.38)

Negative post-test odds (95% CI): 0.29 (0.18–0.46)

Negative post-test probability (95% CI): 0.22 (0.15–0.31)