CD4 and HIV infectious disease: Although duration of HIV infection and CD4 cell count nadir were related to thyroid dysfunction and their ORs and 95% CIs were 1.047 (1.003, 1.093) (P = 0.037) and 0.999 (0.997, 1.000) (P = 0.061) (Table 3), they were not risk factors for thyroid dysfunction.