Multivariate analyses for 6MWT considered as a categorical variable.
| Factor | OR (95% CI) | p |
|---|---|---|
| FVC, % predicted | 1.02 (0.98–1.06) | 0.368 |
| DLCO/VA, % predicted | 1.01 (0.96–1.06) | 0.641 |
| Baseline heart rate, bpm | 0.96 (0.92–1.00) | 0.067 |
| Exercise desaturation, n (%) | 0.46 (0.07–2.90) | 0.409 |
| Minimal saturation < 90% | 0.22 (0.03–1.74) | 0.152 |
| CRP, mg/l | 0.92 (0.85–1.00) | 0.044 |
| Anti-topoisomerase I antibody, n (%) | 1.24 (0.27–5.78) | 0.784 |
| Medsger severity scale class 3–4 | 3.79 (0.44–32.22) | 0.223 |
| European activity score | 0.85 (0.52–1.39) | 0.510 |
For abbreviations, see Table 1.