Table 2.

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

Items, n	AUC	Sensitivity	Specificity	Youden	LR+	LR−	Effect size	Cut-off >	Test items
2	0.72	0.60	0.80	0.40	3.00	0.50	0.97	1	2, 9
4	0.80	0.65	0.83	0.48	3.82	0.42	1.23	2	2, 4, 9, 10
6	0.83	0.60	0.89	0.49	5.45	0.45	1.40	3	2, 4, 5, 7, 9, 10
8	0.85	0.90	0.63	0.53	2.43	0.16	1.45	3	2, 4, 5, 4, 6, 7, 8, 10
10	0.85	0.75	0.82	0.57	3.40	0.20	1.45	3	1, 2, 3, 4, 5, 6, 7, 8, 9, 10
11	0.85	0.77	0.80	0.57	3.70	0.19	1.45	4	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

Forward bend (1), return from forward bend (2), sitting forward lean (3), sitting knee extension (4), pelvic tilt (5), one-leg stance (6), side bending (7), rocking forward (8), prone knee flexion (9), hip abduction/lateral rotation (10), shoulder flexion resting L spine on wall (11).

AUC, area under the curve; LR, likelihood ratio.