Univariate analyses of the predictive factors at diagnosis of spontaneous improvement of pulmonary Langerhans cell histiocytosis during follow-up
| Parameter at diagnosis | Odds ratio (95% CI) | p-value |
| Age years | 0.95 (0.88–1.03) | 0.21 |
| NYHA stage | 2.4 (0.91–6.45) | 0.08 |
| FEV1 % pred | 0.96 (0.92–1.01) | 0.10 |
| BRAF status | 0.39 (0.08–1.9) | 0.24 |
| NRAS status | 0.19 (0.03–1.03) | 0.05 |
| BRAF and NRAS status | 0.1 (0.01–0.98) | 0.048 |
NYHA: New York Heart Association; FEV1: forced expiratory volume in 1 s.