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Results of stepwise multiple regression analyses to identify those variables that best predicted dyspnea assessed by the BDI score.
| BDI score | |
|---|---|
| Independent variables | |
| Age (years) | - |
| Smoking (pack-years) | - |
| BMI (kg/m2) | - |
| FEV1 (L) | 0.262 |
| IC/predicted TLC | - |
| DLCO (mL/min/mmHg) | 0.144 |
| PaO2 (mmHg) | - |
| BNP (pg/mL) | - |
| Cumulative R2 | 0.406 |
