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JAIDS Journal of Acquired Immune Deficiency Syndromes:
Clinical Science

It Is Safe to Stop Antiretroviral Therapy in Patients With Preantiretroviral CD4 Cell Counts >250 cells/μL

Skiest, Daniel J MD*; Morrow, Patrick MD†; Allen, Brady MD†; McKinsey, Judith RN*; Crosby, Craig DO*; Foster, Barbara PHD*; Hardy, R Doug MD*

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Objective: To study clinical, immunologic, and virologic outcomes in patients who stop antiretroviral therapy (ART) with relatively preserved CD4 cell counts.

Design and Methods: Patients with a documented CD4 cell count >250 cells/μL who stopped ART for any reason for at least 5 weeks were studied. Relevant clinical and laboratory data were collected using a standardized data collection form.

Main Outcome Measures: Patients were monitored for outcomes including Centers for Disease Control (CDC) category B or C events, time to restarting ART, and time to reaching a CD4 cell count of ≤250 cells/μL.

Results: A total of 107 patients were included. The median time on ART was 45 months and median number of antiretroviral medications was 4. The median pre-ART CD4 cell count and HIV viral load were 463 cells/μL and 4.35 log copies/mL, respectively. The median CD4 cell at time of ART stop was 739 cell/μL. The slope of the CD4 decrease was 65 cells/mo in the first 2 months, which was greater than the subsequent decline of 8 cells/mo thereafter (P < 0.01). Similarly the median viral load increase was 2.54 log copies/mL in the first 2 months after stopping and was unchanged after that point. Two patients experienced the retroviral rebound syndrome after ART cessation but no CDC category B or C events were observed during 10 months of follow-up. The median time from stopping ART to reaching the combined endpoint of CD4 <250 or restarting ART was 8.9 months. In multivariate analysis, pre-ART CD4 cell count >250 was protective of reaching the combined endpoint (odds ratio = 0.156, P = 0.03). Other predictors of reaching the combined endpoint in multivariate analysis were older age and number of prior ART agents. Patients who restarted ART had a favorable virologic and immunologic response.

Conclusions: Patients with relatively high CD4 cell counts prior to starting ART did well after stopping ART. Pre-ART CD4 cell count can be used to predict outcomes after ART cessation.

© 2004 Lippincott Williams & Wilkins, Inc.


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