Table 3

Diagnostic criteria for the 2, 4, 6, 8, 10 and 11-item solutions for the three-class categorisation

Items, n	VUS	Sensitivity (chronic status)	Sensitivity (acute status)	Specificity	Youden	Effect size	Cut-off ≤, ≥
2	0.41	0.80	0.47	0.23	0.25	1.02	0, 2
4	0.45	0.36	0.38	0.83	0.29	1.30	1, 3
6	0.47	0.42	0.53	0.57	0.27	1.50	1, 4
8	0.52	0.74	0.44	0.63	0.31	1.56	2, 4
10	0.52	0.48	0.50	0.82	0.40	1.56	3, 6
11	0.52	0.52	0.47	0.80	0.40	1.56	3, 6

VUS, volume under the surface.