Table 3 Initial parameters associated with RPILD using a logistic regression model
| Â | Univariate analysis | Multivariate analysis | ||||
|---|---|---|---|---|---|---|
OR | 95% CI | P value | OR | 95% CI | P value | |
Age ≥ 55 years | 5.5 | 2.2–14 |  < 0.001* | – | – | – |
Disease duration < 2 months | 4.3 | 1.7–10.7 | 0.002* | 6.1 | 1.7–22.4 | 0.007* |
Serum ferritin ≥ 1500 ng/ml | 11.9 | 4–35.3 |  < 0.001* | 12.3 | 3.1–49.6 |  < 0.001* |
KL-6 ≥ 1600 U/ml | 6.3 | 2–19.9 | 0.002* | – | – | – |
CRP ≥ 13 mg/L | 5.3 | 2.1–13.5 |  < 0.001* | 4.6 | 1.3–16.9 | 0.021* |
Lymphocyte < 0.5 × 109/L | 3.3 | 1.2–9.1 | 0.024* | – | – | – |
Anti-MDA5 ≥ 190 U/ml | 2.4 | 1–5.7 | 0.051 | – | – | – |
Total CT GGO score ≥ 4 | 10.2 | 3.8–37.5 |  < 0.001* | 6.3 | 1.8–21.9 | 0.003* |