Immunologic Effectiveness of Maraviroc- and Raltegravir-Containing Regimens (R+M+) versus Raltegravir-Based Regimens That Do Not Include Maraviroc (R+M−)

Abstract

To compare the immunologic effectiveness of raltegravir-maraviroc (R+M+)-based regimens with raltegravir-based regimens that do not include maraviroc (R+M-) in treatment-experienced patients in clinical practice. We conducted a retrospective study of treatment-experienced HIV-infected adults receiving either R+M+- or R+M--based therapy. Longitudinal CD4 counts were analyzed using a linear mixed model. One hundred and fifty-six patients were included in the analysis, of whom 32 were receiving R+M+ and 124 R+M-. Mean baseline CD4 counts in patients on R+M+ and R+M- were 463.8 and 442.3 cells/mm(3), respectively (P = .67). In multivariable mixed models, a baseline viral load ≥50 copies/mL was significantly associated with CD4 change during follow-up (P < .0001). No difference between R+M+ and R+M- was observed during follow-up (P = .81). CD4 cell recovery was similar among patients receiving either R+M+- or R+M--based therapy during a 24-month period of follow-up.