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.