Demographic characteristics of patients with HIV infection with 1. advanced anal disease (high-grade anal intraepithelial neoplasia (HGAIN) and/or invasive anal cancer) 2. non-advanced anal disease (negative, atypical squamous cells of undetermined significance (ASCUS), atypical squamous cells – cannot exclude high-grade (ASC-H) or low-grade anal intraepithelial neoplasia (LGAIN), and 3. those without anal pathology. SD = standard deviation, IQR = interquartile range, NA = not applicable, STI = sexually transmitted infection.