ABSTRACT

Objective: The construct validity and reliability of the Yonsei Lifestyle Profile-Values (YLP-V) were verified to measure the value system reflected in lifestyle behaviors. Methods: Data were collected from 300 community-dwelling older adults aged 55 years and older who were registered with an online research organization. The YLP-V was used to collect data, which underwent descriptive statistics, differential item functioning, and factor analysis. Exploratory factor analysis was conducted to estimate the factor structure, and confirmatory factor analysis was used to compare and confirm the validity of four competing models (single-factor, hierarchical factor, multidimensional factor, and bifactor). Results: Exploratory factor analysis using target rotation revealed that the dimensions of the YLP-V (activity, five items; interest, four items; opinion, nine items) showed factor loadings of 0.4 or higher, indicating good construct validity. Confirmatory factor analysis indicated that the bifactor model (χ2 = 164.58**, degree of freedom = 117, root mean square error of approximation = 0.05, standard root mean residual = 0.04, comparative fit index = 0.95, Turker Lewis index = 0.93) demonstrated the best fit among the tested models. Conclusion: We identified a factor structure consistent with evidence for developing the YLP-V, which allows for a micro-level lifestyle approach. The bifactor structure, with 18 items representing activity, interest, and opinion, demonstrated validity, and the YLP-V could be valuable for measuring and understanding the value systems reflected in behaviors within a healthy lifestyle.