CD4 and dementia: Mean nadir of CD4+ T-lymphocytes (CD4+) was 330 (±188) cells/mm3, 13 patients (22%) had a CD4+ nadir <200 cells/mm3 and 12 (20%) had a previous diagnosis of AIDS-defining illness (3 HIV dementia complex, 3 progressive multifocal leukoencephalopathy, 1 atypical disseminated mycobacteriosis, 1 Pneumocystis jirovecii pneumonia, 1 recurrent bacterial pneumonia, 1 disseminated cryptococcosis, 1 extrapulmonary tuberculosis, 1 neurotoxoplasmosis).