Low nadir CD4 cell count predicts sustained hypertension in HIV-infected individuals.

Hypertension is associated with cardiovascular disease in the human immunodeficiency virus (HIV)-infected population. The authors aimed to test the hypothesis whether advanced immunosuppression with low nadir CD4 lymphocyte cell count is a predictor of sustained hypertension in HIV-infected individuals. In a longitudinal study of an HIV cohort of 434 patients (43±11 years, 72% men, 71% Caucasians), standardized blood pressure was measured in duplicate during 3 clinical visits both at baseline and after 3.4±0.8 years. The lowest CD4 cell count in the individual history was recorded as nadir CD4. Both nadir CD4 cell count<50 cells/μL and duration of antiretroviral therapy (ART) were associated with sustained hypertension, and the highest proportion of hypertensive patients was observed in those who had both nadir CD4 cell count<50 cells/μL and prolonged ART duration. Nadir CD4 cell-count<50 cells/μL was an independent predictor of hypertension (adjusted odds ratio [OR], 2.48; 95% confidence interval [CI], 1.27-4.83), as was ART duration (adjusted OR, 1.13; 95% CI, 1.03-1.24). The predictive power of ART duration was more pronounced in patients with nadir CD4 cell count<50 cells/μL. Delaying ART initiation until a state of advanced immunosuppression might add to and even fuel the cardiovascular risk associated with ART.