Cohort Profile: West China Health and Aging Trend (WCHAT)

Area of Science:

• Gerontology
• Epidemiology
• Public Health

Background:

• The West China Health and Aging Trends study (WCHAT) is a multi-ethnic cohort study in Western China.
• It focuses on understanding aging trends, disability, and health outcomes in diverse ethnic populations.

Purpose of the Study:

• To guide efforts in reducing disability and maximizing health and independent functioning in older adults.
• To understand trends in late-life functioning across different ethnic subgroups.
• To investigate the economic and social consequences of aging and disability in Western China.

Main Methods:

• Prospective, multi-center observational study with annual follow-ups.
• Enrolled 7536 participants aged 50+ in 2018 from Yunnan, Guizhou, Sichuan, and Xinjiang.
• Collected geriatric assessments, biological samples (blood, saliva, urine, feces), and self-reported data on fatigue, falls, and cognition.

Main Results:

• Data collection is ongoing, with initial findings focusing on geriatric assessments and biological markers.
• The study aims to examine the influence of culture-specific lifestyles and diet on geriatric outcomes.
• A sample biobank has been established for research on frailty, sarcopenia, and other geriatric syndromes.

Conclusions:

• WCHAT is the first multi-ethnic cohort study in West China examining lifestyle, diet, and environment's influence on geriatric syndromes.
• The study's prospective, multi-center design across diverse ethnic groups provides unique insights.
• Limitations include potential recall bias, self-report errors, and participant attrition, potentially limiting external validity to healthier elderly populations.