Table 5.

Association between late preterm birth and the risk of seizure in children aged up to 3 years, born between 34 and 41 weeks of gestational age

	34–41 weeks			37–41 weeks (term)			34–36 weeks (late preterm)			Term versus late preterm
	n	Number of seizures	Incidence of seizure, % (95% CI)	n	Number of seizures	Incidence of seizure, % (95% CI)	n	Number of seizures	Incidence of seizure, % (95% CI)	P value
Male with birth weight ≥2500 g	34 354	4369	12.7 (12.4 to 13.1)	33 411	4243	12.7 (12.4 to 13.1)	943	126	13.4 (11.3 to 15.7)	0.552
Male with birth weight <2500 g	2649	378	14.3 (13.0 to 15.7)	1604	221	13.8 (12.2 to 15.6)	1045	157	15.0 (13.0 to 17.3)	0.394
Female with birth weight ≥2500 g	32 202	3642	11.3 (11.0 to 11.7)	31 667	3578	11.3 (11.0 to 11.7)	535	64	12.0 (9.5 to 15.0)	0.63
Female with birth weight <2500 g	3483	414	11.9 (10.9 to 13.0)	2454	291	11.9 (10.6 to 13.2)	1029	123	12.0 (10.1 to 14.1)	0.954

	n	Number of febrile seizures	Incidence of febrile seizure, % (95% CI)	n	Number of febrile seizures	Incidence of febrile seizure, % (95% CI)	n	Number of febrile seizures	Incidence of febrile seizure, % (95% CI)	P value
Male with birth weight ≥2500 g	34 354	3356	9.8 (9.5 to 10.1)	33 411	3252	9.7 (9.4 to 10.1)	943	104	11.0 (9.2 to 13.2)	0.182
Male with birth weight <2500 g	2649	301	11.4 (10.2 to 12.6)	1604	173	10.8 (9.4 to 12.4)	1045	128	12.3 (10.4 to 14.4)	0.26
Female with birth weight ≥2500 g	32 202	2636	8.2 (7.9 to 8.5)	31 667	2591	8.2 (7.9 to 8.5)	535	45	8.4 (6.4 to 11.1)	0.812
Female with birth weight <2500 g	3483	306	8.8 (7.9 to 9.8)	2454	211	8.6 (7.6 to 9.8)	1029	95	9.2 (7.6 to 11.2)	0.555