Table 1

Study sample characteristics compared with the clinic cohorts

	Clinic A				Clinic B
	Study sample		2014 Cohort		Study sample		2014 Cohort
	n	%	n	%	n	%	n	%
Gender
Male	18	72.0	2459	77.5	23	85.2	7743	90.3
Female	7	28.0	715	22.5	4	14.8	830	9.7
Age (years)
18–24	0	0.0	124	3.9	0	0.0	186	2.2
25–34	4	16.0	465	14.7	3	11.1	1729	20.2
35–49	16	64.0	1502	47.3	14	51.9	4164	48.6
50+	5	20.0	1083	34.1	10	37.0	2494	29.1
Ethnicity
White	14	56.0	1541	48.6	22	81.5	6401	74.7
Black African	5	20.0	720	22.7	5	18.5	778	9.1
Black Caribbean	0	0.0	114	3.6	0	0.0	201	2.3
Other/mixed	6	24.0	746	23.5	0	0.0	1132	13.2
Not reported	0	0.0	53	1.7	0	0.0	61	0.7
Exposure route
Sex between men	15	60.0	1971	62.1	22	81.5	6776	79.0
Heterosexual contact	9	36.0	1037	32.7	5	18.5	1209	14.1
Injecting drug use	1	4.0	52	1.6	0	0.0	109	1.3
Other	0	0.0	112	3.5	0	0.0	46	0.5
Undetermined	0	0.0	2	0.1	0	0.0	433	5.1
Year of diagnosis
Pre-1997	6	24.0	638	20.1	5	18.5	1399	16.3
1997–2005	6	24.0	1234	38.9	8	29.6	2580	30.1
2006–2012	7	28.0	986	31.1	10	37.0	3199	37.3
2013 onwards	6	24.0	316	10.0	4	14.8	1395	16.3
Total			3174				8573