Table 3.
Spearman correlation between questionnaires and FEV1/FVC ratio.
| CAPTURE R (p-Value) |
CDQ R (p-Value) |
LFQ R (p-Value) |
COPD PS R (p-Value) |
COPD SQ R (p-Value) |
FEV1/FVC R (p-Value) |
|
|---|---|---|---|---|---|---|
| CAPTURE | 0.128 (0.333) | −0.364 (0.005) | 0.473 (0.000) | 0.403 (0.002) | −0.206 (0.118) | |
| CDQ | 0.128 (0.333) | −0.456 (0.000) | 0.303 (0.020) | 0.622 (0.000) | −0.426 (0.001) | |
| LFQ | −0.364 (0.005) | −0.456 (0.000) | −0.638 (0.000) | −0.713 (0.000) | −0.316 (0.015) | |
| COPD-PS | 0.473 (0.000) | 0.303 (0.020) | −0.638 (0.000) | 0.506 (0.000) | −0.334(0.015) | |
| COPD-SQ | 0.403 (0.002) | 0.622 (0.000) | −0.713 (0.000) | 0.506 (0.000) | −0.381 (0.003) | |
| FEV1/FVC | −0.206 (0.118) | −0.426 (0.001) | 0.316 (0.015) | −0.334(0.015) | −0.381 (0.003) |
Abbreviations: R of Spearman (p-value). CDQ: COPD Diagnostic Questionnaire; COPD-PS: COPD Population Screener; COPD-SQ: COPD Screening Questionnaire; CAPTURE: COPD screening questionnaire; LFQ; Lung function questionnaire.