The Impact of Life Satisfaction on Mortality: A Comprehensive Analysis
Understanding the Role of Life Satisfaction in Longevity: This research delves into the influence of various aspects of life satisfaction on overall mortality. The study, involving UK Biobank participants, focuses on five key components of life satisfaction: health, family, friendship, work, and financial aspects. A unique composite score was developed to quantify overall life satisfaction, helping to explore its connection with mortality rates.
Key Findings on Health Satisfaction and Mortality: A significant discovery of this study is the strong inverse relationship between overall life satisfaction and mortality, particularly emphasizing health satisfaction. Participants with high levels of health satisfaction showed a notably lower risk of all-cause mortality. This highlights health satisfaction as a crucial element, potentially more influential than other life satisfaction components, and independent of physical health conditions and socio-demographic factors.
Implications for Positive Psychological Interventions: The study suggests that enhancing health satisfaction could be a vital target for interventions aimed at increasing longevity. While acknowledging the limitations of an observational study, the findings underscore the potential of focusing on psychological well-being, specifically health satisfaction, to improve lifespan.
Article Information
Life satisfaction components and all-cause and cause-specific mortality: A large prospective cohort study
Journal of Affective Disorders, Teng-Fei Lin et al.
Abstract
Background: Which life satisfaction components could be a target of positive psychological interventions for longevity is largely unknown. We aimed to investigate association of the composite measure of life satisfaction and its individual components with mortality.
Methods: This cohort study included UK biobank participants who responded to questions concerning five components of life satisfaction at baseline. We generated a composite score representing overall life satisfaction, ranging from 0 (lowest) to 5 (highest). The outcomes were all-cause and cause-specific mortality. We used multivariable Cox regression to estimate hazard ratios (HR) for the associations of interest.
Results: Among 165,842 eligible participants, 12,261 all-cause deaths were observed over a median of 12.9-year follow-up. Overall life satisfaction was inversely associated with all-cause mortality (adjusted HR 0.94 [95%CI: 0.93-0.95] per 1 score increment). Health satisfaction showed the strongest association with all-cause mortality, with a fully adjusted HR of 0.52 (95%CI: 0.49-0.55) for very/extreme satisfaction and 0.63 (95%CI: 0.59-0.66) for moderate satisfaction, compared with unsatisfaction (P-trend<0.001), independent of other satisfaction components, regardless of physical health and sociodemographics. The association for family, friendship, work, and financial satisfaction was attenuated when adjusted for other life satisfaction components. Similar findings were observed for cause-specific mortality.
Limitation: Observational study with single baseline measurement of life satisfaction precludes the ability to establish causal relationship.
Conclusion: Higher overall life satisfaction was associated with lower mortality. As the major contributor to lower mortality regardless of physical health and sociodemographics, health satisfaction could be an important target of positive psychological interventions for longevity.
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