Grouped HPV seroprevalence of nine vaccine types by age group.

<p>9vHPV category included nine vaccine types (6, 11, 16, 18, 31, 33, 45, 52, and 58). ‘9vHPV’ variable was created, if a man was positive for one or more of the nine vaccine types then the ‘9vHPV’variable was seropositive otherwise seronegative. 4vHPV category included seropositivity to at least one of the four types of HPV (6, 11, 16 and 18). High-risk 9vHPV category included seropositivity to at least one of the seven types of HPV (16, 18, 31, 33, 45, 52 and 58). Low-risk 9vHPV category included seropositivity to at least one of the two types of HPV (6 and 11). Significant p-value <0.05 is marked with ‘*’. P-value was obtained from Cochran-Armitage Trend Test. P_trend <0.05 for high-risk and five additional types categories.