Canonical correlation analysis for the scores of each domain of QLICD-COPD (V2.0) with values of clinical objective indicators in patients with chronic obstructive pulmonary disease
| n | Correlation coefficient | Proportion | Approximate F value | df | P value |
| 1 | 0.35 | 0.458 | 3.03 | 60 | <0.0001 |
| 2 | 0.26 | 0.338 | 2.37 | 42 | <0.0001 |
| 3 | 0.08 | 0.105 | 1.48 | 26 | 0.0625 |
| 4 | 0.08 | 0.100 | 1.57 | 12 | 0.1022 |
QLICD-COPD (V2.0), Quality of Life Instrument for Chronic Diseases-COPD (V2.0).