Table 1

HIV incidence, as estimated by serological testing algorithm for recent HIV seroconversion, among previously undiagnosed† men who have sex with men in the unlinked anonymous genitourinary medicine survey in London and elsewhere in England, Wales and Northern Ireland*, 1997 and 2004

Area	Age group (years)	1997					2004
Area	Age group (years)	Est annual incidence per 100 py	95% CI	Negative specimens	Positive specimens	Recent infections by STARHS‡	Est annual incidence per 100 py	95% CI	Negative specimens	Positive specimens	Recent infections by STARHS‡
E,W&NI, England, Wales and Northern Ireland; STARHS, serological testing algorithm for recent HIV seroconversion.
Data for other years available on request. Source: Unlinked anonymous genitourinary medicine surveys in England, Wales and Northern Ireland^16,¹⁷
*Those who were aware of their HIV status, including men on highly active antiretroviral therapy and those with AIDS, were excluded from analyses.
†Data were not available for Scotland.
‡Missing specimens were allocated as reactive or non-reactive in STARHS by reallocation in the same proportion as known specimens by clinic and age group.
London	<35	2.58	(1.31 to 4.85)	2750	142	22	2.80	(1.34 to 5.31)	2312	99	21
London	⩾35	2.58	(1.05 to 5.66)	1497	81	11	4.16	(2.06 to 7.68)	1751	110	24
Elsewhere in E,W&NI	<35	2.04	(0.56 to 5.67)	950	31	6	1.64	(0.58 to 3.81)	1855	26	10
Elsewhere in E,W&NI	⩾35	1.90	(0.28 to 7.06)	532	14	3	3.78	(1.5 to 8.17)	1034	47	13