Table 1.

Incidence Rates of Grouped Human Papillomavirus Types Detected on Genital Warts

HPV type detected in genital warts	No. (%)a	Incidence, cases per 1000 person-years (95% CI)
Incidence of any GW	112 (100.0)	2.35 (1.94–2.83)
Any HPVb	90 (80.4)	1.89 (1.52–2.33)
Positive for multiple HPV types	51 (45.5)	1.05 (.78–1.39)
Unclassified infectionsc	6 (5.4)	0.13 (.05–.27)
Nononcogenic HPV types only	47 (42.0)	0.99 (.73–1.31)
Oncogenic HPV types only	6 (5.4)	0.13 (.05–.27)
Both nononcogenic and oncogenic HPV types	31 (27.7)	0.65 (.44–.93)
HPV 6/11	60 (53.6)	1.26 (.96–1.62)
HPV 16/18	14 (12.5)	0.29 (.16–.49)

Abbreviations: CI, confidence interval; GW, genital wart; HPV, human papillomavirus.

^aDenominator is the 112 men who developed incident GWs.

^bIncludes unclassified HPV infections.

^cInfections that tested positive for HPV DNA by polymerase chain reaction but did not test positive for any of the 37 HPV types.