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Stepwise logistic regression analysis of risk factors for ROP
| Log odds ratio (b) | Standard error of b | Odds ratio | 95% CI of odds ratio | |
| Gestational age at birth | −0.5809 | 0.1183 | 1.788* | 1.418 to 2.254 |
| Birth weight | −0.00243 | 0.000916 | 1.275† | 1.065 to 1.526 |
*Odds ratio for a decrease of 1 week in gestational age.
†Odds ratio for a reduction of 100 g in birth weight.
