Theoretically derived CVLT subtypes in HIV-1 infection: internal and external validation

Area of Science:

• Neuroscience
• Psychology
• Infectious Diseases

Background:

• Adults with HIV-1 infection often exhibit cognitive impairments, particularly in memory.
• Understanding memory heterogeneity is crucial for effective clinical management in this population.

Purpose of the Study:

• To identify distinct memory subtypes in adults with HIV-1 infection using the California Verbal Learning Test (CVLT).
• To examine the clinical interpretability and neuropsychological correlates of identified memory subtypes.

Main Methods:

• Confirmatory factor analysis of the CVLT structure.
• Two-stage cluster analysis of variables with high factor loadings.
• Internal and external validation of identified clusters.

Main Results:

• A four-factor model (Attention Span, Learning Efficiency, Delayed Recall, Inaccurate Recall) best fit the CVLT data.
• Four reliable memory subtypes were identified: Normal, Atypical, Subsyndromal, and Frontal-striatal.
• Subtypes showed clinical interpretability and correlations with neuropsychological functioning and depressive symptoms.

Conclusions:

• The findings highlight significant memory profile heterogeneity in HIV-1 infection.
• A frontal-striatal conceptualization of verbal memory performance is supported.
• Identification of these subtypes has implications for tailored clinical management of HIV-1 infected adults.