HIV+ men and women show different performance patterns on procedural learning tasks

Area of Science:

• Neuroscience
• Psychology
• Infectious Diseases

Background:

• Nondeclarative learning may be impaired in HIV-seropositive (HIV+) individuals.
• Previous studies often included limited numbers of women, potentially obscuring sex-specific effects.

Purpose of the Study:

• To investigate sex differences in nondeclarative learning among HIV+ and HIV- individuals with a history of substance dependence.
• To determine if HIV-associated neurocognitive disorder (HAND) manifests differently in men and women.

Main Methods:

• Administered motor skill and probabilistic learning tasks to assess nondeclarative/procedural learning.
• Included well-matched groups of 148 men and 65 women, with subgroups of HIV+ and HIV- participants, all abstinent during testing.

Main Results:

• HIV+ women performed significantly worse on both learning tasks compared to HIV- women.
• HIV+ men's performance did not significantly differ from HIV- men on either task.
• Demonstrated differential impact of HIV on cognitive function between sexes.

Conclusions:

• Findings suggest that HAND cannot be generalized from men to women.
• Women may be more vulnerable to the neurocognitive effects of HIV and substance dependence.
• Further research is needed on sex differences in HAND and potential female vulnerability.