• Emanuele Nicastri, Sebastiano Leone, Claudio Angeletti, Lucia Palmisano, Loredana Sarmati, Antonio Chiesi, Andrea Geraci, Stefano Vella, Pasquale Narciso, Angela Corpolongo, and Massimo Andreoni.
• National Institute for Infectious Diseases, IRCCS Lazzaro Spallanzani, Rome, Italy. nicastri@inmi.it
• J. Antimicrob. Chemother. 2007 Oct 1; 60 (4): 724-32.

BackgroundSince the introduction of highly active antiretroviral therapy (HAART), morbidity and mortality rates have sharply decreased among HIV-infected patients. Studies of possible differences between men and women in the course of HIV infection give conflicting results. The objective of this study was to assess sex differences during HAART.MethodsA literature search by using the MEDLINE database between March 2002 and February 2007 was performed to identify all published studies on the sex-specific differences on the impact of HAART. All articles with measures of effect (preferably adjusted odds ratio, relative risk or hazard ratio with 95% CI) of sex on viroimmunological and clinical parameters during HAART were included. Five different topics of interest in our research were selected: time of initiation of HAART, adherence, viroimmunological response, clinical response and adverse reactions during HAART.ResultsUS data report an initiation of HAART at an earlier disease stage in men compared with women. After initiation of HAART, most authors do not report any viroimmunological difference, although a few clinical studies showed a significantly better virological response in women compared with men. Nevertheless, women were more likely to be less adherent to antiretrovirals and to have non-structured treatment interruptions than men. This is likely to be related to the higher number of adverse reactions they experience during HAART. Finally, discordant opinions with regard to clinical benefits during HAART exist, but recent clinical and observational trials suggest a better clinical outcome for women.ConclusionsWe found little evidence of sex differences during antiretroviral treatment. Nevertheless, most of these studies were underpowered to detect sex differences and had limited follow-up at 6 or 12 months. Design of new gender-sensitive clinical trials with both prolonged follow-up and sample size representative of the current HIV prevalence among women are strongly needed to detect the likely sex differences of antiretroviral agents during HIV infection.

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