Comparison of outcome measures calculated during calibration and cross-validation of a violence screening tool for individuals with hospital discharge diagnoses of schizophrenia.

Note: NPV = negative predictive value; PPV = positive predictive value; DOR = diagnostic odds ratio; AUC = area under the curve; CI = confidence interval. Participants from the calibration and cross-validation samples were excluded if they were not at risk for 1, 2, or 5 years (respectively). All AUCs were significantly higher than chance. Test statistics reported no significant differences between the effect estimates produced by the calibration and cross-validation samples. The instrument's PPV increased significantly over time in both the calibration and the cross-validation samples. Differences in DOR and AUC were non-significant despite evidence of non-overlapping confidence intervals.