Table 2.

Performance of model predicting suicide attempters in the test set (N=796)

Confusion matrix
Predicted class	Actual class		Total
	Suicide attempt +	Suicide attempt -
Suicide attempt +	341	32	373
Suicide attempt -	56	367	423
Total	397	399	796
Prediction scores
Accuracy*	0.889
Sensitivity	0.859
Specificity	0.920
Positive predictive value	0.914
Negative predictive value	0.868

^*95% CI: 0.866–0.910, p value (ACC>NIR)<0.001.

CI: confidence interval, ACC: accuracy, NIR: no information rate