Table 1

Birth characteristics of whole study cohort and of a subsample who had at least one emergency hospital admission* with indicators of high dependency care or intensive care between the ages of 7 days and 4 years

		Children n=8 577 680		Emergency admissions*
		Children n=8 577 680		High dependency care		Intensive care
		N	%	N	%	N	%
Emergency admission†	No	6 462 956	75.3	–		–
Emergency admission†	Yes	2 114 724	24.7	27 568	100.0	13 121	100.0
Sex	Female	4 174 749	48.7	11 894	43.1	5555	42.3
	Male	4 391 748	51.2	15 674	56.9	7566	57.7
	Missing	11 183	0.1	–	0.0	–	0.0
Ethnicity	White	5 496 696	64.1	19 100	69.3	8576	65.4
Asian or Asian British		770 991	9.0	3182	11.5	1768	13.5
Black or Black British		404 103	4.7	1290	4.7	822	6.3
	Mixed	322 563	3.8	977	3.5	544	4.2
	Other (any)	238 318	2.8	696	2.5	337	2.6
	Missing	1 345 009	15.7	2323	8.4	1074	8.2
Region	North East	385 335	4.5	1021	3.7	860	6.6
	North West	1 104 928	12.9	4412	16.0	1476	11.2
	Yorkshire	827 331	9.6	2474	9.0	1073	8.2
	East Midlands	667 681	7.8	3164	11.5	1448	11.0
	West Midlands	894 875	10.4	3817	13.8	1530	11.7
	East of England	881 488	10.3	2715	9.8	1493	11.4
	London	1 576 060	18.4	3643	13.2	2422	18.5
	South East	1 286 964	15.0	4040	14.7	1695	12.9
	South West	722 135	8.4	2182	7.9	1068	8.1
	Missing	230 883	2.7	100	0.4	56	0.4
IMD group	1 most deprived	2 334 812	27.2	9112	33.1	4395	33.5
	2	1 857 417	21.7	6188	22.4	3121	23.8
	3	1 539 676	17.9	4790	17.4	2176	16.6
	4	1 357 309	15.8	3800	13.8	1741	13.3
5 least deprived		1 301 427	15.2	3490	12.7	1586	12.1
	Missing	187 039	2.2	188	0.7	102	0.8
Gestational term (weeks)	Preterm (<37)	395 831	4.6	5003	18.1	2624	20.0
	Term (37–41)	6 221 403	72.5	17 679	64.1	8039	61.3
	Post-term (>41)	283 123	3.3	595	2.2	285	2.2
	Missing	1 677 323	19.6	4291	15.6	2173	16.6
Birth weight (kg)	Very low (<1.5)	52 274	0.6	1581	5.7	867	6.6
Birth weight (kg)	Low (<2.5 g)	352 502	4.1	3200	11.6	1776	13.5
	Normal (2.5–4.2)	6 508 768	75.9	18 342	66.5	8300	63.3
Above normal (>4.2)		397 147	4.6	956	3.5	356	2.7
	Missing	1 266 989	14.8	3489	12.7	1822	13.9
Congenital anomalies	No	8 316 268	97.0	20 151	73.1	8099	61.7
Congenital anomalies	Yes	261 412	3.0	7417	26.9	5022	38.3

*Includes emergency admissions between 1 April 2008 and 31 March 2017. Only the first admission with an HDC or IC indicator per child is counted and where both indicators are present in the same admission, it is categorised as IC.
†Any emergency admission over the study period.