Variables associated with post-discharge TSB >95th centile in clinical risk factor logistic regression model and corresponding clinical risk factor score
| Variable | OR (95% CI) | p value | Clinical risk factor score* |
|---|---|---|---|
| *Points for each clinical risk factor were generated by multiplying the corresponding OR by two and rounding down to the nearest integer. | |||
| †Infant birth weight (kg) was transformed by subtracting 2 kg and dividing by 0.5 in order to generate the odds ratio for increased risk of significant hyperbilirubinaemia for every 0.5 kg birth weight above 2.5 kg. | |||
| Birth weight† | 1.5 (1.2 to 1.9) | 0.001 | |
| 2000–2500 g | 0 | ||
| 2501–3000 g | 3 | ||
| 3001–3500 g | 6 | ||
| 3501–4000 g | 9 | ||
| 4001–4500 g | 12 | ||
| 4501–5000 g | 15 | ||
| GA<38 weeks | 2.6 (1.5 to 4.5) | 0.001 | 5 |
| Oxytocin | 2.0 (1.2 to 3.4) | 0.005 | 4 |
| Vacuum delivery | 2.2 (1.5 to 3.6) | 0.003 | 4 |
| Exclusive breast feeding | 2.6 (1.5 to 4.5) | <0.001 | 5 |
| Breast and bottle feeding | 2.3 (1.1 to 4.9) | 0.03 | 4 |