Table 4 Odds ratio (95% confidence interval) of variables associated with dysfunction at 36 months of age.
| Variable | Comparison | Crude odds ratio (95% CI) | Adjusted odds ratio (95% CI) |
|---|---|---|---|
| Maternal hypertension during pregnancy | Yes v no | 0.59 (0.34 to 1.02) | 0.61 (0.32 to 1.18) |
| Birth weight | <1000 v ⩾1000 g | 2.99 (1.76 to 5.11)*** | 1.23 (0.50 to 2.99) |
| Birth length | <10th v ⩾10th centile | 2.97 (1.68 to 5.26)** | 1.54 (0.75 to 4.4) |
| Birth head circumference | <10th v ⩾10th centile | 1.27 (0.72 to 2.28) | 1.25 (0.68 to 2.30) |
| Gestational age | ⩽30 v >30 weeks | 3.01 (1.75 to 5.15)*** | 1.04 (0.435 to 2.47) |
| Sex | Male v female | 2.70 (1.60 to 4.50)*** | 2.30 (1.21 to 4.37)* |
| AGA | Yes v no | 1.44 (0.87 to 2.41) | 1.25 (0.586 to 2.71) |
| Ventilation | Yes v no | 3.51 (2.06 to 6.01)*** | 1.77 (0.78 to 4.01) |
| Neurofunctional status at 3 months chronological age | Impaired v normal | 7.35 (3.88 to 13.91)*** | 4.33 (2.05 to 9.12)*** |
*p<0.05; **p<0.001; ***p<0.0001 (logistic regression analysis).
AGA, Appropriate size for gestational age.