Table 4.
Results of Cox regression analysis to identify factors that independently predict mortality, including magnitude of change in exercise capacity (∆ISWT), for patients who completed pulmonary rehabilitation
| B | Exponential (95% CI) for B | p-value | |
|---|---|---|---|
| Age at assessment# | <0.001 | 1.000 (1.000) | 0.003** |
| Pack years smoked | 0.002 | 1.002 (0.996–1.009) | 0.473 |
| Gender | 0.186 | 1.204 (0.866–1.673) | 0.269 |
| MRC grade (pre-PR) | 0.164 | 1.178 (0.980–1.416) | 0.081 |
| BMI | −0.065 | 0.937 (0.907–0.968) | <0.001** |
| ISWT (pre-PR) | −0.003 | 0.997 (0.995–0.998) | <0.001** |
| % predicted FEV1 | −0.021 | 0.979 (0.961–0.997) | 0.026* |
| Home oxygen use | −0.014 | 0.986 (0.658–1.476) | 0.944 |
| ΔISWT (pre- to post-PR) | −0.003 | 0.996 (0.994–0.998) | 0.018* |
Note:
#
Age at assessment as a time dependent covariable,
*
significant at p<0.05,
**
significant at p<0.001.
Abbreviations: MRC, Medical Research Council; PR, pulmonary rehabilitation; BMI, body mass index; ISWT, incremental shuttle walking test.