The frequency of HPV positivity in different combinations of clinical diagnosis and topography of lesions.

aData is presented as number of HPV positive samples/total number of samples at the intersection of row and column (percentage within subgroup), empty cells contain no samples i.e. 0/0(0);bThere were samples from multiple locations and/or diagnosis and such samples were counted in each respective row or column. However, samples described with multiple topographical codes of the same region (i.e. tongue codes are 39 to 45) were counted only once within that subgroup. Thus the number of diagnosis-location pairs is greater than the number of individual samples in the study.