Table 2 Time trends in sexual behaviour and STI/HIV prevalence among male clients of female sex workers: Cotonou, 1998–2005.

Cotonou	1998	2002	2005	p value
Commercial sex partners	n = 330*	n = 602*	n = 298*
Frequency visit FSW/year: mean (median)	32 (24)	11.1 (5)	19.8 (12)	<0.001†
Condom used last sex act with FSW	55.8%	68.1%	94.6%	<0.001
Consistent condom use with FSW	39.0%	55.1%	86.2%	<0.001
Non‐commercial sex partners
Is married or has a regular girlfriend	79.9%†	83.3%§	54.8%**	NC
Consistent condom use regular partner	13.1%	16.8%	11.4%	0.71
Has casual (non‐FSW) sex partners	34.7%†	68.2%§	16.6%**	NC
Condom used last sex with casual sex partner	NA	47.3%	85.7%	<0.001‡
Consistent condom use with casual sex partners	28.6%	24.5%	65.3%	<0.001
HIV/STI prevalence	n = 404*	n = 630*	n = 313*
HIV	8.4%	8.8%	6.9%	0.59
Neisseria gonorrhoeae	5.4%	2.4%	1.6%	<0.01
Chlamydia trachomatis	2.7%	4.0%	3.2%	0.59

NA, data not available for that survey round. NC, variables not directly comparable (significance testing not carried out).

*Total sample size for each round: denominators for specific variables vary due to incomplete data, as in some cases men left before the interview was finished, or chose not to answer specific questions. Denominators for biological assays are higher than those for interview, since some men gave a a urine sample before having sex with a FSW, and then left after having had sex, having decided not to give an interview; †currently; §had sex with in last year; **had sex with in last 3 months; p value: chi square test for trend; †analysis of variance; ‡chi square test.