Sensitivity and specificity of different measures of assessment applied to evaluation set data
| True positives | False positives | Sensitivity % | Specificity % | |
| Cross-shift fall >5 L·min−1 | 9/18 | 2/22 | 50 | 90.9 |
| Oasys-2 score >2.5 | 15/18 | 2/22 | 83.3 | 90.9 |
| Mean rest–work PEF >16 L·min−1 | 12/18 | 0/22 | 66.7 | 100 |
True and false positives are given as proportion of individuals in each group. PEF: peak expiratory flow.