Table 4.
Factors Detected by the Stepwise Method
| Duration at ≥2.0 METs | Duration at ≥3.0 METs | Total Activity at ≥3.0 METs | Step Count | |||||
|---|---|---|---|---|---|---|---|---|
| β | p | β | p | β | p | β | p | |
| 6MWD | 0.139 | 0.044 | 0.221 | 0.001 | 0.240 | <0.001 | 0.295 | <0.001 |
| mMRC | −0.199 | 0.007 | −0.256 | <0.001 | −0.240 | <0.001 | −0.180 | 0.011 |
| HADS-A | 0.178 | 0.004 | 0.127 | 0.026 | 0.141 | 0.013 | 0.119 | 0.047 |
| FEV1 %pred | 0.213 | 0.002 | 0.245 | <0.001 | 0.242 | <0.001 | 0.175 | 0.008 |
| Age | – | – | −0.132 | 0.020 | – | – | – | – |
| BNP | – | – | – | – | −0.127 | 0.022 | – | – |
Abbreviations: METs, metabolic equivalents; 6MWD, 6-minute walking distance; mMRC, modified Medical Research Council; HADS-A, anxiety score of Hospital Anxiety and Depression Scale; FEV1 %pred, forced expiratory volume in 1 second % of predicted value; BNP, brain natriuretic peptide.