Although our entire HIV+ sample was on HAART and had a satisfactory median CD4 T-cell count of 556.03 (SD: 313.57), the HIV-infected individuals were more likely to have moderate and severe periodontitis than the uninfected ones, regardless of other variables that may also influence periodontitis, such as the presence of xerostomia, smoking, hygiene habits, socioeconomic status, diet, mental health, age, and microbiological factors [58, 59]. Here, CD4 is linked to xerostomia.