Table 4. Association between being born very or moderate preterm and school performance.

Measure	Very preterm(<32 weeks)		Moderate preterm(32–36 weeks)
	Unadjusted	Fully adjusted*†‡	Unadjusted	Fully adjusted*†‡
Poor outcome at KS1
Matched for DOB	2.45 (1.67–3.60)	2.26 (1.49–3.42)	1.48 (1.22–1.81)	1.29 (1.02–1.62)
Matched for EDD	2.69 (1.85–3.91)	2.34 (1.55–3.54)	1.58 (1.29–1.93)	1.37 (1.09–1.72)
Matched for EDD and same year of schooling	1.88 (1.10–3.21)	1.59 (0.89–2.84)	1.41 (1.12–1.77)	1.22 (0.94–1.57)
Poor outcome at KS2
Matched for DOB	1.97 (1.35–2.87)	1.81 (1.19–2.75)	1.17 (0.97–1.41)	1.10 (0.89–1.36)
Matched for EDD	2.20 (1.49–3.26)	1.86 (1.18–2.92)	1.24 (1.03–1.50)	1.12 (0.90–1.39)
Matched for EDD and same year of schooling	1.82 (1.14–2.91)	1.55 (0.90–2.69)	1.06 (0.86–1.30)	0.97 (0.76–1.23)
Poor outcome at KS3
Matched for DOB	2.11 (1.43–3.13)	1.86 (1.17–2.95)	1.14 (0.94–1.37)	0.99 (0.80–1.22)
Matched for EDD	2.11 (1.41–3.16)	1.91 (1.18–3.07)	1.16 (0.96–1.41)	1.05 (0.84–1.30)
Matched for EDD and same year of schooling	2.23 (1.31–3.79)	2.00 (1.07–3.73)	1.10 (0.89–1.37)	0.95 (0.73–1.23)
Poor outcome at KS4
Matched for DOB	1.74 (1.22–2.50)	1.84 (1.20–2.83)	1.13 (0.94–1.35)	1.05 (0.85–1.30)
Matched for EDD	1.89 (1.30–2.75)	1.84 (1.20–2.83)	1.16 (0.96–1.39)	1.05 (0.85–1.31)
Matched for EDD and same year of schooling	1.88 (1.18–3.02)	1.63 (0.95–2.78)	1.05 (0.86–1.29)	0.93 (0.73–1.19)
Special educational needs (KS4)
Matched for DOB	2.09 (1.43–3.06)	1.76 (1.06–2.95)	1.46 (1.21–1.76)	1.27 (1.03–1.58)
Matched for EDD	2.10 (1.48–2.99)	1.90 (1.26–2.87)	1.53 (1.27–1.85)	1.33 (1.06–1.65)
Matched for EDD and same year of schooling	1.84 (1.14–2.98)	1.78 (1.05–3.02)	1.34 (1.09–1.66)	1.15 (0.90–1.46)

* Adjusted for ethnicity, maternal education, socio-economic group and age, gender, parity, weight, length and head circumference at birth, mode of delivery and maternal hypertension

Measures are OR (95% CI) for preterm infants vs. term infants