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Results of the logistic regression analysis.
| Predictor | Odds ratio | 95% CI | Increment | P-value |
| Age (years) | 1.005 | 0.952–1.064 | 1 | 0.86 |
| BMI (kg–1 m2) | 0.902 | 0.771–1.037 | 1 | 0.16 |
| TLC (% predicted) | 0.472 | 0.254–0.782 | 10 | < 0.01 |
| mMRC score | 2.051 | 1.156–3.857 | 1 | 0.02 |
CI, confidence intervals; BMI, body mass index; TLC, total lung capacity; mMRC, Medical Research Council scale.
