Factors associated with ROP treatment
| Risk factor | RR (95% CI)* |
|---|---|
| No antenatal steroids | 1.66 (1.57 to 1.75) |
| Male sex | 1.08 (1.03 to 1.13) |
| GA | |
| 24 vs 27 | 5.23 (4.83 to 5.65) |
| 25 vs 27 | 3.46 (3.20 to 3.74) |
| 26 vs 27 | 1.89 (1.74 to 2.05) |
| BWZ score (per 1 unit increase—equivalent to 1 SD increase) | 0.76 (0.74 to 0.78) |
| Caesarean section | 1.26 (1.19 to 1.33) |
| Multiples | 1.04 (0.98 to 1.10) |
*Derived by Poisson analyses.
BWZ, birth weight z-score; GA, gestational age; ROP, retinopathy of prematurity; RR, risk ratio.