Predictors of subgroup success from logistic regression (with 95% CI): age over 25 years, height less than 165 cm, worst pain less than 53.25 mm, mid-foot width difference greater than 10.96 mm
| Variable | Sensitivity (95% CI) | Specificity (95% CI) | Positive likelihood ratio (95% CI) | Post-test (%) | No in success group | No in non-success group |
|---|---|---|---|---|---|---|
| 1+ | 1 (0.77 to 1.0) | 0.36 (0.19 to 0.57) | 1.6 (1.2 to 2.1) | 52.7 | 17 | 16 |
| 2+ | 0.71 (0.44 to 0.89) | 0.68 (0.46 to 0.84) | 2.2 (1.1 to 4.2) | 59.5 | 12 | 8 |
| 3+ | 0.35 (0.15 to 0.61) | 0.96 (0.78 to 0.99) | 8.8 (1.2 to 66.9) | 85.4 | 6 | 1 |
4 Unable to calculate as no patient satisfied all four criteria