Table 3.
Correlation analysis between value of ELVAR, level of Albumin, P/F ration and significant different indices from comparison between early death group and early survival group.
| Correlation analysis | Value of ELVAR | Level of Albumin | P/F ratio | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Spearman ρ | P-value | Kendall τ | P-value | Spearmanρ | P- value | Kendallτ | P- value | Spearman ρ | P-value | Kendall τ | P-value | |
| Duration from treatment to death or 1 year | 0.488 | 0.000* | 0.502 | 0.000* | 0.511 | 0.000* | ||||||
| ELVAR | / | / | 0.363 | 0.006* | 0.323 | 0.016* | ||||||
| Albumin | 0.363 | 0.006* | / | / | 0.433 | 0.001* | ||||||
| P/F ratio | 0.323 | 0.016* | 0.433 | 0.001* | / | / | ||||||
| Ferritin | −0.295 | 0.029* | −0.391 | 0.003* | −0.245 | 0.072 | ||||||
| Age at onset | −0.247 | 0.069 | −0.356 | 0.008* | −0.211 | 0.121 | ||||||
| CRP | −0.219 | 0.108 | −0.455 | 0.000* | −0.322 | 0.017* | ||||||
| FVC | −0.010 | 0.953 | −0.046 | 0.785 | 0.029 | 0.865 | ||||||
| DLCO | −0.015 | 0.928 | −0.197 | 0.236 | 0.286 | 0.082 | ||||||
| Mortality within 3 months | 0.382 | 0.001* | 0.428 | 0.000* | 0.419 | 0.000* | ||||||
| Mortality within 12 months | 0.363 | 0.001* | 0.429 | 0.000* | 0.399 | 0.000* | ||||||
| Oxygen supplementation | −0.287 | 0.006* | −0.219 | 0.035* | −0.658 | 0.000* | ||||||
| Severity of type I respiratory failure | −0.287 | 0.007* | −0.301 | 0.005* | −0.725 | 0.000* | ||||||
*
P < 0.05.
CRP, C reactive protein; DLCO, carbon monoxide diffusing capacity; ELVAR, Efficient Lung Vetilation Area Ratio; FVC, forced vital capacity; P/F ratio, PaO2/FiO2 ratio.