Table 1

Survey year, source, location and numbers approached, participating and included in the analyses

Year of survey	Source	Location	Number approached	Number participating (N = 9613)	Response rate (%)	Number included in analyses (N = 8305)*
1996	MRC	Edinburgh/Glasgow	2881	2276	79	2097
1999	MRC	Edinburgh/Glasgow	3202	2498	78	2125
2000	HGS	Edinburgh/Glasgow	1029	803	78	652
2002^a	MRC	Edinburgh/Glasgow	2796	1734	62	1468
2002^b	GMH	Edinburgh	456	283	62	262
2003	GMH	Edinburgh	429	275	64	230
2005	MRC	Edinburgh/Glasgow	2642	1744	66	1471

*Those who responded to all of the following questions: age, ever had HIV test, date of last HIV test and numbers of unprotected anal intercourse partners in the previous year. GMH, Gay Men’s Health; HGS, Healthy Gay Scotland; MRC, Medical Research Council.