Firth’s penalized logistic regression for positive first-time alloimmunization
| Exploratory Model | Predictors | Corticosteroid Exposure, Odds Ratio | P Value | 95% CI |
|---|---|---|---|---|
| Model 1 | Treatment only | 0.264 | .1182 | 0.029–1.041 |
| Model 2 | Treatment and age | 0.264 | .1144 | 0.029–1.041 |
| Model 3 | Treatment, age, and ethnicity | 0.266 | .1136 | 0.029–1.051 |