Table 2.
Odds ratios (and 99% confidence intervals) of pre-threshold ROP associated with low gestational age and low birth weight Z-score in models that adjust for potential mediators. Model 1 does not include interaction terms, whereas Model 2 does.
| Model 1§ | Model 2§ | |
|---|---|---|
| Gestational age 23–24 weeks | 6.8 (2.7, 17) | 11.6 (2.9, 47) |
| Gestational age 25–26 weeks | 4.4 (1.9, 11) | 8.1 (2.1, 32) |
| Birth weight Z-score < −2 | 1.4 (0.6, 3.6) | 9.1 (1.1, 76) |
| Birth weight Z-score ≥ −2, < −1 | 1.7 (0.9, 3.1) | 3.5 (0.5, 23) |
| GA-BW interactions | ||
| GA:23–24 x BWZ < −2 | 0.3 (0.01, 7.1) | |
| GA:23–24 x BWZ ≥ −2, < −1 | 0.4 (0.05, 3.9) | |
| GA:25–26 x BWZ < −2 | 0.1 (0.01, 1.1) | |
| GA:25–26 x BWZ ≥ −2, < −1 | 0.4 (0.06, 3.5) |
§
Both models are adjusted for highest PaO2, highest PCO2, highest quartile of days ventilated, and “late” bacteremia.