Harmonized cognitive performance in an older adult cohort of Vietnamese American immigrants: The VIP study
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View abstract on PubMed
Summary
This summary is machine-generated.This study models cognitive aging in Vietnamese Americans, harmonizing data with a large national study. Findings show minimal bias, enabling better research into health disparities for this underrepresented group.
Area Of Science
- Cognitive Aging Research
- Health Disparities in Immigrant Populations
- Psychometrics and Item Response Theory
Background
- Vietnamese Americans are an understudied group regarding cognitive aging.
- Unique risk factors for cognitive decline exist within this population.
- Existing cognitive aging studies often lack representation from diverse ethnic groups.
Purpose Of The Study
- To model global cognition in older Vietnamese Americans.
- To harmonize cognitive ability estimates with the National Alzheimer's Coordinating Center (NACC) dataset.
- To enable psychometric matching of cognitive measures across diverse cohorts.
Main Methods
- Utilized item response theory (IRT) to analyze cognitive data from the Vietnamese Insights into Cognitive Aging Program (VIP) and NACC cohorts.
- Assessed seven common cognitive items for differential item functioning (DIF) between the VIP and NACC datasets.
- Harmonized cognitive composite scores using items without salient DIF.
Main Results
- Global cognitive functioning was modeled in 548 Vietnamese American participants (VIP study).
- Cognitive data from 15,923 participants (NACC) were used for harmonization.
- Five of seven common items exhibited DIF, but the impact on factor score estimates was negligible for most VIP participants (affecting only 2.19%).
Conclusions
- Global cognition can be reliably estimated in Vietnamese American immigrants with minimal psychometric bias.
- Cognitive measures were successfully harmonized with a large-scale study (NACC), facilitating broader research.
- This study opens avenues for investigating health disparities in cognitive aging among underrepresented populations.
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