Table 2.

Key variables study sample compared to population in database.

	Immunisations				Children
	Sample		Database		Sample		Database
	n	%	N	%	n	%	n	%
Total	6,257,828	100	8,083,825	100	1,005,827	100	1,149,892	100
Gender
Female	3,316,654	53.0	4,260,954	52.7	554,218	55.1	613,028	53.3
Male	2,941,174	47.0	3,822,871	47.3	451,609	44.9	536,864	46.7
Region
London	1,230,368	19.7	1,569,082	19.4	182,774	18.2	207,922	18.1
Midlands and East	1,063,025	17.0	1,379,538	17.1	168,861	16.8	193,846	16.9
North	1,945,646	31.1	2,503,791	31.0	318,034	31.6	365,689	31.8
South	2,018,789	32.3	2,631,414	32.6	336,158	33.4	382,435	33.3
IMD
1	1,163,036	18.9	1,490,016	18.8	182,923	18.5	210,269	18.7
2	1,128,030	18.4	1,454,788	18.3	179,850	18.2	206,181	18.3
3	1,135,039	18.5	1,460,684	18.4	181,663	18.4	208,307	18.5
4	1,257,428	20.5	1,627,364	20.5	204,479	20.7	233,233	20.7
5	1,457,420	23.7	1,900,810	24.0	237,484	24.1	268,885	23.9