. Author manuscript; available in PMC: 2015 Apr 8.

Published in final edited form as: Schizophr Res. 2013 Mar 19;146(0):125–131. doi: 10.1016/j.schres.2013.02.031

Table 3.

Predictive validity of the screening tests.

Screening test	Se (95% CI)	Sp (95% CI)	PPV (95% CI)	NPV (95% CI)	AUC (95% CI)
DALI cannabis/cocaine subscale	0.81 (0.57-0.93)	0.62 (0.47-0.75)	0.45 (0.28-0.62)	0.90 (0.74-0.96)	0.72 (0.57-0.86)
Positive urine sample for cannabis	0.56 (0.33-0.77)	0.69 (0.54-0.81)	0.41 (0.23-0.61)	0.81 (0.65-0.90)	0.63 (0.46-0.79)

Se: sensitivity; Sp: specificity; PPV: positive predictive value; NPV: negative predictive value; AUC: area under curve; CI: confidence interval.