Times to incidence and clearance of oral HPV infections and their incidence rates for different HPV genotypes and species.

*Time (mo) to the first incident event by HPV genotype among baseline HPV-negative women:1all baseline HPV-negative women at risk for incident event;2only women who developed an incident event;**Incidence events per 1000WMR at risk;3all baseline HPV-negative women at risk,4only women who developed an incident event; the months at risk calculated i) until the first incident event (for those who had one), or ii) as total FU months for those with no incident event (Total WMR = 8591); IR, incidence rate; RR, Risk Ratio.3all women at risk for clearance of their HPV infection; months at risk being calculated 1)until the first clearance event, or 2) as total FU months for those with no clearance event (Total WMR = 6647);4only women with clearance event (months at risk calculated until the first clearance event); RR = Risk Ratio; including cases with no clearance (in Kaplan-Meier analysis total n = 171 and n = 152 for types and species, respectively); NC = non computable.