Table 4.
Comparation of the Screening Performances of the COPD-PS and COPD-SQ
| Cut-off With Maximum YI | Recommended Cut-off | |||||
|---|---|---|---|---|---|---|
| COPD-PS ≥ 4 | COPD-SQ ≥ 15 | P value | COPD-PS ≥ 5 | COPD-SQ ≥ 16 | P value | |
| Spirometry-defined COPD | ||||||
| AUC | 0.672 | 0.702 | 0.179 | 0.651 | 0.694 | 0.052 |
| Sensitivity (%) | 58.1 | 62.8 | 0.377 | 40.3 | 56.6 | < 0.001 |
| Specificity (%) | 76.2 | 77.6 | 0.268 | 89.9 | 82.2 | < 0.001 |
| COPD-PS ≥ 5 | COPD-SQ ≥ 15 | P value | COPD-PS ≥ 5 | COPD-SQ ≥ 16 | P value | |
| Symptomatic COPD | ||||||
| AUC | 0.734 | 0.779 | 0.095 | 0.734 | 0.763 | 0.269 |
| Sensitivity (%) | 56.5 | 78.3 | < 0.001 | 56.5 | 70.7 | 0.015 |
| Specificity (%) | 90.2 | 77.6 | < 0.001 | 90.2 | 82.0 | < 0.001 |
Abbreviations: COPD, chronic obstructive pulmonary disease; COPD-PS, chronic obstructive pulmonary disease population screener; COPD-SQ, chronic obstructive pulmonary disease screening questionnaire; AUC, area under the receiver operating characteristic curve; YI, Youden index.