Table 3. Classification of suicidal ideation versus suicidal behaviour (child-reported and parent-reported): Results of binomial penalized logistic regression analysis.

Comparison	Alpha	AUROC	SD AUROC	Sensitivity	Specificity	Accuracy	PPV	NPV
Child-reported STB
Ideation versus suicidal behaviour
	0.25	0.580	0.146	0.659	0.460	0.559	0.549	0.574
	0.50	0.559	0.130	0.691	0.413	0.552	0.541	0.572
	0.75	0.546	0.104	0.722	0.352	0.537	0.527	0.559
	1.00	0.558	0.119	0.707	0.371	0.539	0.529	0.559
Parent-reported STB
Ideation versus suicidal behaviour
	0.25	0.486	0.195	0.634	0.358	0.496	0.497	0.495
	0.50	0.521	0.179	0.729	0.313	0.521	0.515	0.536
	0.75	0.519	0.168	0.692	0.318	0.505	0.504	0.508
	1.00	0.533	0.213	0.705	0.318	0.512	0.509	0.519

Note: PPV: positive predictive value, NPV: negative predictive value