Table 4.
Bivariate correlations between VAScough and clinical parameters in ILD.
| All | IPF | Non-IPF-ILD | ||||
|---|---|---|---|---|---|---|
| r | p-Value | r | p-Value | r | p-Value | |
| FVC, % predicted | −0.222 | 0.119 | 0.107 | 0.725 | −0.478 | 0.025 |
| DLCO, % predicted | −0.466 | 0.038 | −0.148 | 0.727 | −0.640 | 0.025 |
| 6MWD, m | −0.367 | 0.042 | 0.144 | 0.738 | −0.773 | <0.01 |
| SPD | −0.227 | 0.189 | 0.086 | 0.779 | −0.350 | 0.110 |
| Active time | −0.207 | 0.232 | −0.090 | 0.771 | −0.221 | 0.324 |
| KBILD | −0.539 | 0.001 | −0.616 | 0.025 | −0.437 | 0.042 |
| SGRQ | 0.195 | 0.269 | −0.063 | 0.838 | 0.204 | 0.374 |
Bivariate correlations with Pearson’s correlation coefficient r between VAScough and clinical variables. Abbreviations: visual analogue scale (VAS), idiopathic pulmonary fibrosis (IPF), interstitial lung disease (ILD), forced vital capacity (FVC), diffusion capacity for carbon monoxide (DLCO), 6-min walk distance (6MWD), steps per day (SPD), King’s Brief Interstitial Lung Disease questionnaire (KBILD), St. George’s Respiratory Questionnaire (SGRQ).