Table 1

Significant univariate associations with cerebral palsy, severe motor disability, and developmental index scores

Variable	Cerebral palsy		Severe motor disability		PDI		MDI
Variable	OR	95% CI	OR	95% CI	Coeff	95% CI	Coeff	95% CI
†Parenchymal pathology and/or ventriculomegaly on final cranial ultrasound scan.
p<0.05, p<0.01, p<0.001, **p<0.0001.
OR, Odds ratio; Coeff, regression coefficient which is equivalent to the effect size in development index units; ROP, retinopathy of prematurity.
Afro-Caribbean	0.95	0.39 to 2.28	0.75	0.22 to 2.62	−0.05	−4.45 to 4.35	−9.63	−13.95 to −5.30***
Maternal education ⩾A level	0.57	0.26 to 1.24	0.54	0.18 to 1.65	2.18	−1.31 to 5.66	3.83	0.32 to 7.35*
Primigravida	0.82	0.42 to 1.58	1.05	0.45 to 2.42	2.75	−0.39 to 5.89	1.24	−1.99 to 4.48
>2 previous perinatal deaths	0.56	0.26 to 1.21	0.49	0.16 to 1.45	−0.6	−4.04 to 2.84	−4.34	−7.82 to −0.87*
Maternal smoking in pregnancy	1.51	0.81 to 2.81	1.10	0.47 to 2.57	−3.96	−7.15 to −0.77*	−1.72	−5.04 to 1.61
Male	2.40	1.30 to 4.45***	2.14	0.95 to 4.82	−4.16	−7.13 to −1.18**	−3.08	−6.18 to 0.02
Antepartum steroids	0.74	0.60 to 1.49	0.4	0.17 to 0.92*	2.23	−1.50 to 5.97	3.44	−0.37 to 7.25
Chorioamnionitis	0.35	0.14 to 0.85*	0.51	0.18 to 1.53	−1.17	−4.57 to 2.23	−1.91	−5.46 to 1.64
Prolonged rupture of membranes	1.06	0.55 to 2.07	1.10	0.46 to 2.63	−0.08	−3.38 to 3.22	−1.80	−5.20 to 1.60
Vaginal breech delivery	2.27	1.21 to 4.26*	2.48	1.11 to 5.53*	3.78	0.15 to 7.40*	2.67	−1.16 to 6.50
Moved hospitals within 24 h	4.49	2.09 to 9.65****	6.82	2.84 to 16.38****	−1.25	−6.54 to 4.05	0.86	−4.92 to 6.65
Pulmonary haemorrhage	2.65	1.05 to 6.70*	6.69	2.51 to 17.84****	−2.19	−8.43 to 4.05	−1.73	−8.12 to 4.65
Enteral feeds by 7 days	0.27	0.14 to 0.52***	0.29	0.12 to 0.72**	0.94	−2.09 to 3.96	1.94	−1.22 to 5.10
Breast milk in hospital	0.49	0.23 to 1.04	0.36	0.14 to 0.88*	5.75	1.36 to 10.14*	1.89	−2.63 to 6.42
Supplemental oxygen at 36 weeks	2.29	1.03 to 5.12*	3.17	0.93 to 10.83	−5.07	−8.32 to −1.81**	−5.12	−8.46 to −1.78**
>6 weeks systemic steroids	2.26	1.02 to 4.98*	4.30	1.76 to 10.52**	−3.9	−8.70 to 0.90	−2.54	−7.99 to 2.91
>8 weeks systemic steroids	4.74	1.69 to 13.28**	4.76	1.52 to 14.90**	−3.71	−11.24 to 3.83	−8.21	−17.06 to 0.64
Treatment for ROP	1.15	0.51 to 2.57	2.46	1.00 to 6.01*	−4.58	−8.62 to −0.53*	−1.05	−5.47 to 3.36
Significantly abnormal USS†	5.17	2.60 to 10.27****	6.94	3.03 to 15.88****	−6.5	−11.45 to −1.54**	−0.21	−5.28 to 4.87