Representativeness in health research studies: an audit of Greater Manchester Clinical Research Network studies between 2016 and 2021

Table 2 Sample characteristics of Greater Manchester Clinical Research Network-led, single-site studies by clinical speciality

Clinical Speciality	Age				Women				Ethnic minority group				Smoking^a
	All		Unbiased		All		Unbiased		All		Unbiased		All
	Total N	Mean	Total N	Mean	Total N	%	Total N	%	Total N	%	Total N	%	Total N	%
Cancer	8637	58.6	8014	58.6	8637	82.5	3106	52.0	3835	6.3	3835	6.3	5583	20.5
Mental Health	626	31.2	432	31.2	626	38.2	500	38.6	432	NP	432	NP	194	NP
Musculoskeletal Disorders	605	56.3	605	56.3	605	66.6	605	66.6	NR	NR	NR	NR	482	NP
Primary Care	3530	59.1	3433	59.1	3053	57.8	3467	57.0	1306	2.4	1306	2.4	NR	NR
Renal Disorders	3697	66.1	3073	66.1	1223	39.8	2972	37.8	3053	4.7	3053	4.7	3053	64.6
Respiratory Disorders	667	63	22	63	667	96.3	49	NP	645	2.8	645	2.8	667	12.4

Unbiased estimates exclude studies that selected on that demographic. NA not applicable, NR not reported, NP not presented. Total N < 500.
^aNo studies sampled on smoking so unbiased estimated not calculated

ISSN: 1741-7015