Table 3.
The top- ranked variables by the variable importance for each year in Baseline and Incremental Model.
| Mean rank | Follow-up 1 | Follow-up 2 | Follow-up 3 | Follow-up 4 |
|---|---|---|---|---|
| Baseline | ||||
| 1 | Birthweight | Birthweight | Birthweight | Birthweight |
| 2 | Maternal age | Gestational age | Maternal age | Region of birth |
| 3 | Length of hospital stay | Maternal age | Gestational age | Gestational age |
| 4 | Gestational age | Length of hospital stay | Length of hospital stay | Length of hospital stay |
| 5 | Sex | Region of birth | Sex | Maternal age |
| Incremental | ||||
| 1 | Birthweight | Birthweight | Birthweight | Birthweight |
| 2 | Maternal age | Maternal age | Length of hospital stay | Maternal age |
| 3 | Length of hospital stay | Gestational age | Gestational age | Gestational age |
| 4 | Gestational age | Sex | Sex | Region of birth |
| 5 | Sex | Length of hospital stay | Maternal age | Length of hospital stay |