A cluster analysis of health behaviours and their relationship to mental health difficulties, life satisfaction and functioning in adolescents

Research has documented relationships between individual health behaviours and mental health, but few studies have examined patterns of health behaviours (i.e., health lifestyles) and mental health outcomes. This study investigated the relationship between health lifestyles and mental health and psychological wellbeing in adolescents. Data from the My World Survey 2 - Second Level (MWS2-SL), a random national sample of 9493 adolescents (44.2% male) aged 12-18 years (M = 14.8, SD = 1.66) in second level education in Ireland were used. TwoStep cluster analysis identified clustering of health behaviours (sleep, alcohol use, cannabis use, social media use, sport and hobby participation). ANOVA and Chi Square tests identified potential differences in demographic characteristics (age, gender, socioeconomic status, ethnicity) and psychological outcomes (anxiety, depression, life satisfaction, daily functioning) across clusters. Three clusters were identified; 1. Low (22.0%), 2. Moderate-high (41.5%) and 3. High (36.5%), health promoting. The 'Low' health-promoting cluster, characterised by high alcohol, cannabis and social media use, moderate sport and hobby participation, and low sleep duration, demonstrated the highest levels of anxiety and depression and the lowest levels of life satisfaction, self-esteem and daily functioning. The 'High' health-promoting cluster reported the most favourable psychological outcomes. Cluster 1 were more likely to be older and male, Cluster 3 were more likely to be younger and female. Findings demonstrate the potential for health promotive lifestyles to mitigate mental health difficulties and promote life satisfaction and daily functioning in adolescents. Health lifestyles represent important indicators of mental health and targets for prevention/promotion efforts.