of borderline significanceP =0.066
The interaction term with age group remained of borderline significance for HPV 16 ( P =0.066) and nonsignificant for HPV 18 ( P =0.67) when the other HPV terms were adjusted for.
The interaction term with age group remained of borderline significance for HPV 16 ( P =0.066) and nonsignificant for HPV 18 ( P =0.67) when the other HPV terms were adjusted for.
A test for interaction to compare the magnitude of the ORs across the three age groups (with age group fitted as a linear term) failed to reach statistical significance ( P =0.15).
The risk of a more severe grade of outcome lesion increased with baseline HPV infection, with a significant trend across the case groups.