Factor structure for the frailty syndrome was consistent across Europe

Area of Science:

• Gerontology
• Public Health
• Psychometrics

Background:

• Frailty is a key indicator of health in older adults.
• Standardized frailty assessment is crucial for effective interventions.
• Cross-cultural comparisons require validated measurement properties.

Purpose of the Study:

• To evaluate the measurement properties of frailty using Fried's phenotype definition.
• To compare frailty assessment across 12 European countries.
• To optimize frailty assessment for international research.

Main Methods:

• Utilized data from the Survey of Health, Ageing and Retirement in Europe (SHARE) with 27,938 participants aged 50+.
• Specified frailty as a unidimensional construct.
• Employed confirmatory factor analysis (CFA) and multigroup CFA to test measurement invariance across countries.

Main Results:

• The unidimensional frailty model demonstrated good fit across countries.
• Significant differences in frailty parameters were found between countries, necessitating country-specific adjustments.
• Mean frailty levels varied significantly across the European populations studied.

Conclusions:

• The relationship between frailty indicators and the construct shows cross-country variation.
• Differing levels of frailty exist among middle-aged and older populations in Europe.
• Frailty assessment requires careful consideration of country-specific measurement properties.