Table 2.
Correlations between the decline in the ESMCSAs and clinical parameters.
| Variables | r | 95%CI | P-value |
|---|---|---|---|
| Age, year | −0.044 | −0.244–0.156 | 0.637 |
| Baseline body mass index, kg/m2 | −0.175 | −0.357–0.020 | 0.057 |
| Baseline FVC, % predicted | −0.285 | −0.464–−0.089 | 0.002 |
| Baseline FEV1/FVC, % | 0.187 | −0.009–0.369 | 0.042 |
| Baseline DLCO, % predicted | −0.172 | −0.337–0.017 | 0.063 |
| Baseline distance walked during 6MWT, m | −0.171 | −0.341–0.019 | 0.064 |
| Baseline lowest SpO2 during 6MWT, % | −0.290 | −0.458–−0.101 | 0.002 |
| Relative decline in FVC, % | 0.202 | 0.022–0.358 | 0.028 |
| Relative decline in DLCO, %* | 0.083 | −0.096–0.267 | 0.377 |
| Relative decline in body mass index, % | 0.394 | 0.217–0.552 | <0.001 |
Abbreviations: ESMCSA;, cross-sectional areas of elector spine muscles; FVC, forced vital capacity; FEV1, forced expiratory volume in 1.0 second; DLCO, diffuse capacity of the lung for carbon monoxide; 6MWT, 6-minute walk test; SpO2, percutaneous oxygen saturation.
*We analysed using n = 114 because 5 cases were missing.