Table 3. Association between being born preterm (<37 weeks) and school performance.
| Measure | Unadjusted | Adjusted for social factors* | Adjusted for social factors and antenatal factors*† | Fully adjusted*†‡ |
|---|---|---|---|---|
| KS1 | ||||
| Matched for DOB | 1.65 (1.38–1.96) | 1.57 (1.31–1.88) | 1.49 (1.22–1.82) | 1.44 (1.17–1.77) |
| Matched for EDD | 1.77 (1.48–2.10) | 1.67 (1.40–2.00) | 1.59 (1.30–1.95) | 1.53 (1.24–1.88) |
| Matched for EDD and same year of schooling | 1.47 (1.19–1.81) | 1.38 (1.11–1.71) | 1.30 (1.02–1.64) | 1.26 (1.00–1.60) |
| KS2 | ||||
| Matched for DOB | 1.29 (1.09–1.52) | 1.22 (1.02–1.46) | 1.23 (1.01–1.48) | 1.20 (0.99–1.46) |
| Matched for EDD | 1.38 (1.17–1.64) | 1.29 (1.08–1.55) | 1.27 (1.05–1.54) | 1.23 (1.01–1.50) |
| Matched for EDD and same year of schooling | 1.13 (0.93–1.37) | 1.05 (0.86–1.29) | 1.03 (0.83–1.28) | 1.03 (0.82–1.28) |
| KS3 | ||||
| Matched for DOB | 1.28 (1.08–1.51) | 1.19 (1.00–1.43) | 1.17 (0.97–1.42) | 1.11 (0.91–1.35) |
| Matched for EDD | 1.30 (1.09–1.55) | 1.22 (1.02–1.47) | 1.20 (0.99–1.46) | 1.16 (0.95–1.42) |
| Matched for EDD and same year of schooling | 1.21 (0.99–1.48) | 1.10 (0.89–1.36) | 1.07 (0.85–1.35) | 1.04 (0.82–1.32) |
| KS4 | ||||
| Matched for DOB | 1.23 (1.05–1.44) | 1.15 (0.97–1.37) | 1.15 (0.95–1.39) | 1.10 (0.91 to 1.34) |
| Matched for EDD | 1.27 (1.08–1.50) | 1.16 (0.97–1.39) | 1.17 (0.97–1.41) | 1.17 (0.96 to 1.42) |
| Matched for EDD and same year of schooling | 1.14 (0.95–1.36) | 1.03 (0.84–1.26) | 1.01 (0.81–1.25) | 1.00 (0.80 to 1.26) |
| Special educational needs (KS4) | ||||
| Matched for DOB | 1.57 (1.33–1.86) | 1.49 (1.25–1.77) | 1.39 (1.15–1.68) | 1.39 (1.14–1.68) |
| Matched for EDD | 1.64 (1.39–1.93) | 1.54 (1.29–1.83) | 1.44 (1.18–1.74) | 1.43 (1.17–1.74) |
| Matched for EDD and same year of schooling | 1.40 (1.15–1.70) | 1.31 (1.07–1.61) | 1.20 (0.97–1.50) | 1.21 (0.97–1.52) |
* Adjusted for ethnicity, maternal education, socio-economic group and age.
† Further adjusted for gender, parity, weight, length and head circumference at birth.
‡ Further adjusted for mode of delivery and maternal hypertension
Measures are OR (95% CI) for preterm infants vs. term infants