Table 3. Population attributable fractions for special educational needs due to gestational age at delivery (wk).
| Gestation at Delivery (wk) | Attributable Fractiona | 95% CI |
| 24–27 | 0.005 | (0.004–0.006) |
| 28–32 | 0.011 | (0.010–0.013) |
| 33–36 | 0.020 | (0.017–0.024) |
| 37 | 0.016 | (0.012–0.020) |
| 38 | 0.020 | (0.016–0.028) |
| 39 | 0.019 | (0.012–0.027) |
| 42 | 0.007 | (0.003–0.010) |
| 43 | 0.000 | (0.000–0.000) |
| Total | 0.100 | (0.007–0.129) |
a
Adjusted for infant sex, maternal age and height, marital status, parity, birth-weight centile, induction of labour, mode of delivery, year of delivery, previous spontaneous and therapeutic deliveries, and 5-min Apgar score.