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Does patient sex affect human immunodeficiency virus levels?
Monica Gandhi1, Peter Bacchetti, Paolo Miotti
1Department of Medicine, Infectious Diseases Division, University of California, San Francisco, CA, 94143, USA. mgandhi@itsa.ucsf.edu
Summary
Women with human immunodeficiency virus (HIV) infection generally have lower viral loads than men. This epidemiological review found consistently lower HIV RNA levels in women across multiple studies, regardless of disease stage or treatment.
Area of Science:
- Epidemiology
- Virology
- Immunology
Background:
- Viral load is a key indicator for managing human immunodeficiency virus (HIV) infection.
- Understanding factors influencing viral load, such as sex, is crucial for effective treatment strategies.
Purpose of the Study:
- To critically review epidemiological evidence on sex-based differences in human immunodeficiency virus (HIV) RNA levels.
- To determine if women exhibit lower HIV viral loads compared to men at similar stages of infection.
Main Methods:
- Systematic review and meta-analysis of 13 published studies.
- Inclusion of both cross-sectional and longitudinal study designs.
- Analysis of viral load measurements (HIV RNA) in HIV-infected men and women.
Main Results:
- Seven cross-sectional studies indicated women had approximately 2-fold lower HIV RNA levels than men, even after adjusting for CD4(+) cell count.
- Four longitudinal studies showed women had 2- to 6-fold lower HIV RNA levels than men, controlling for time since seroconversion.
- Confounder adjustments (age, race, transmission mode, therapy) did not alter the observed sex-based difference in viral load.
Conclusions:
- Women with HIV infection consistently demonstrate lower viral loads compared to men.
- These findings have significant implications for the interpretation of viral load data in guiding antiretroviral therapy decisions.
- Further research may explore biological or behavioral factors contributing to these observed sex differences in HIV viral dynamics.