Table 2

Average percentage change per quarter in the proportion of patients presenting with genital warts (with 95% CI) for two time periods, Q1 2004 to Q4 2007 and Q1 2008 to Q4 2008

	Change per quarter before end 2007 (95% CI)	p Value	Change per quarter after end 2007 (95% CI)	p Value	p Value comparing change per quarter before and after end 2007
Women <28 years	+1.8% (+0.2% to +3.4%)	0.03	−25.1% (−30.5% to −19.3%)	<0.001	<0.001
Women ⩾28 years	+1.0% (−1.5% to +3.7%)	0.43	−4.7% (−13.9% to +5.4%)	0.34	0.32
Men sex with men only*	+0.5% (−2.1% to +3.1%)	0.71	−5.9% (−14.6% to +3.5%)	0.21	0.25
Men sex with women only*	−0.6% (−1.8% to +0.6%)	0.31	−5.0% (−9.4% to −0.5%)	0.03	0.10
Primary genital herpes	+1.8% (−0.1% to +3.8%)	0.06	−3.4% (−9.9% to +3.4%)	0.32	0.20

A positive percentage indicates a quarter-to-quarter increase, a negative percentage indicates a quarter-to-quarter decrease. p Values are presented for the null hypotheses of no quarterly change within each period and for the null hypothesis that the quarterly change before and after end-2007 is the same. *Refers to the gender of the sexual partners in the past 12 months.