Table 1

Study populations and their characteristics

	Southwark Lambeth population N=129 412		Step 1 Identify			Step 2 Engagement				Step 3 Care
	Southwark Lambeth population N=129 412		Population 1 Tracer condition N=19 773			Population 2 Engaged with population health management system N=4719			Population 2a Engaged subset in GP practices offering care N=2767	Population 4 Children with unmet needs and received care N=1129
	Number	Col* %	Number	Col* %	Row %	Number	Col* %	Row %		Number	Col %	Row %
All tracer conditions	19 773	15	–	–	–	4719	–	24	2767	1129	–	40.8
Asthma	8725	6.7	8725	44	–	2124	45	24	1214	347	31	29
Constipation	4549	3.5	4549	23	–	661	14	15	373	189	17	51
Eczema	4149	3.2	4149	21	–	1061	23	26	586	251	22	43
More than 1 condition	2350	1.8	2350	12	–	873	19	37	594	342	30	58
No tracer condition	109 639	85	–	–	–	–	–	–		–	–	–
Age
<2 years	29 226	23	3157	16	11	647	14	21	351	143	13	41
2–<5 years	22 286	17	4030	20	18	1099	23	27	660	299	26	45
5–<8 years	22 154	17	3390	17	15	969	21	29	572	245	22	43
8–<13 years	36 833	28	6091	31	17	1570	33	26	964	363	32	38
13–<16 years	18 913	15	3105	16	16	434	9.2	14	220	79	7.0	36
Sex
Female	63 419	49	9177	46	14	2181	46	24	1255	532	47	42
Male	65 993	51	10 596	54	16	2538	54	24	1512	597	53	39
Ethnicity
Asian	6812	5.3	1283	6.5	19	284	6.0	22	180	70	6.2	39
Black	26 399	20	5160	26	20	1116	24	22	669	315	28	47
Mixed	11 111	8.6	1837	9.3	17	478	10	26	306	115	10	38
Other	5858	4.5	755	3.8	13	161	3.4	21	64	23	2.0	36
White	35 616	28	4571	23	13	1282	27	28	794	294	26	37
Missing data	43 616	34	6167	31	14	1398	30	23	754	312	28	41
Deprivation†
1 (most deprived)	51 723		8835	45	17.1	1988	42	23	1077	466	41	43
2	45 423	35	6855	35	15.1	1652	35	24	1101	461	41	42
3	24 450	19	3151	16	12.9	786	17	25	431	157	14	36
4	6807	5.3	810	4.1	11.9	259	5.5	32	134	38	3.4	28
5 (least deprived)	912	0.7	110	0.6	12.1	33	0.7	30	23	6	0.5	26
Missing data	97	0.1	12	0.1	–	1	–	–	1	1	–	–

These data are from a total population of 129 412 children aged <16 years, between April 2018 and September 2020, registered with 70 GP practices, in Lambeth and Southwark, South London. Tracer condition population (population 1) are children those identified through primary care records as having a tracer condition. The ‘engaged’ population (population 2) are those children who responded to an invitation and completed a health check. Only children registered with intervention or pilot practices, who completed the health check, were eligible for service triage (population 2a). Population 4 are those children who completed a health check, reported symptoms above threshold and received early intervention care.
*Both column and row percentages (%) are displayed. Column % helps to describe demographic breakdown within each population, while row % helps to describe the proportion of children who are represented in each stage of the population health management process.
†Indices of Multiple Deprivation 2019 levels determined by England population quintiles.
Col, column; GP, general practitioner.