Linking health-related behaviours to quality of life in older adults: A latent class analysis

Abstract Background Life expectancy and healthy life years diverge considerably in Austria, and quality of life (QoL) varies widely among older people. Identifying the factors most relevant to QoL in older people is crucial. We aimed to investigate the association between health behaviour, including lifestyle and preventive behaviour, and QoL in this population. Methods Cross-sectional data from the Austrian Health Interview Survey (2019) were used, including 3,995 individuals aged 65 years and older. We performed latent class analysis (LCA) to identify patterns of health behaviours. Variables were selected based on the WHO framework of Active Ageing including factors related to lifestyle (physical exercise, fruit/vegetable intake, BMI, oral health, smoking, alcohol use) and the health care system (satisfaction, unmet needs, participation in screening, health checks and vaccination). Domain scores of the WHOQOL-BREF were used for QoL assessment. Class differences were assessed by survey regressions. Results In the LCA, four different behavioural classes emerged among the older-aged Austrian population, including (class 1) ‘best preventive behaviour and very good lifestyle’ (17.7%), (class 2) ‘worst lifestyle and worst preventive behaviour, high unmet healthcare needs and unsatisfied with the system’ (16.5%), (class 3) ‘very good preventive behaviour and best lifestyle, but worst vaccination probability’ (24.8%) and (class 4) ‘poor preventive behaviour, good lifestyle, but no physical activity’ (41.0%). The classes with unhealthy lifestyles (classes 2 and 4) had worse QoL in all domains compared to the classes with healthy lifestyles (classes 1 and 3). The four classes differ on demographic, socio-economic and health characteristics. Conclusions To improve the QoL of the older population, policies and interventions need to be tailored to the specific characteristics and needs of each behavioural class. Key messages • This study explores the relationship between health behaviour and QoL in older Austrians. • Findings support the development of differentiated interventions targeting different types of behaviour.