Validity and reliability of the Yonsei lifestyle profile‐active, balance, connection, diversity.

Introduction: Lifestyle, defined as a way of living resulting from an individual's deliberate choices, is a crucial factor in improving and maintaining health. Consequently, the measurement and analysis of lifestyle are of significant importance. This study aims to validate the validity and reliability of the Yonsei Lifestyle Profile‐Active, Balance, Connection, Diversity (YLP‐ABCD) in measuring health‐related lifestyles. Methods: Data were collected from 300 participants aged 55 and older using the YLP‐ABCD. To analyse the validity and reliability of the YLP‐ABCD, analysed using frequency, descriptive statistics, confirmatory factor analysis, and Rasch model analysis. Results: The results indicate that the YLP‐ABCD, which consists of 35 items, demonstrates unidimensionality and local independence. The Rasch model confirmed the suitability of the 5‐point Likert scale for the factors, excluding subfactors Balanced and Unbalanced. The item fit criteria (0.5 < MNSQ < 1.5) were met for all items. The distribution of the respondents' abilities suggests the need for additional items to measure their ability levels. Both the item and respondent separation indices and their reliabilities were satisfactory. Conclusion: This study confirmed the utility of the YLP‐ABCD as a valuable tool for measuring and understanding the multifaceted diversity of lifestyles. Therefore, by utilising YLP‐ABCD to quantitatively measure health lifestyles, we anticipate contributing to improvements in human health and quality of life. [ABSTRACT FROM AUTHOR]