Table 5.
Asthma Control Test with Various Cutoff Points Compared with Global Initiative for Asthma Criteria for Assessing “Not Well-Controlled” Asthma in 83 Patients
| Cutoff points | Sensitivity % | Specificity % | PPV % | NPV % | Correctly classified % | Kappa | P |
|---|---|---|---|---|---|---|---|
| ≤17 | 89.1 | 68.4 | 65.0 | 90.5 | 84.3 | 0.564 | <0.001 |
| ≤18 | 81.2 | 73.7 | 53.8 | 91.2 | 79.5 | 0.486 | <0.001 |
| ≤19 | 75.0 | 78.9 | 48.4 | 92.3 | 75.9 | 0.441 | <0.001 |
| ≤20 | 71.9 | 89.5 | 48.6 | 95.8 | 75.9 | 0.473 | <0.001 |
| ≤21 | 65.6 | 89.4 | 43.6 | 95.5 | 71.1 | 0.402 | <0.001 |
| ≤22 | 50.0 | 94.7 | 36.0 | 97.0 | 60.2 | 0.284 | <0.001 |
| ≤23 | 39.1 | 94.7 | 31.6 | 96.2 | 51.8 | 0.198 | 0.005 |
| ≤24 | 25 | 94.7 | 27.3 | 94.1 | 41.0 | 0.106 | 0.061 |
The cutoff point with significantly highest statistical values was written in bold.
NPV, negative predictive value; PPV, positive predictive value.