Purpose is linked to longer life. Habits explain only part.

Meta-analysis of cohort studies. 488,765 people. follow-up up to 32 years (cohort means 4.9-26.5 years in the individual-participant data).

Many studies, added up. People were watched, not told what to do. A clue, not proof.

Who: Adults (18+) in 25 samples from the US, Europe, Japan, the UK and Australia (high-income countries only); purpose/meaning/ikigai self-reported; 48,928 deaths

• More purpose-24%lower death risk
• + habits and health-15%still lower
• + depression-9%8 cohorts only

More to know, from our read of the paper:

• Observational: association, not causation. Purpose was self-reported
• The headline HR 0.76 (24% lower risk) is adjusted only for sociodemographics (age, sex, race, ethnicity, education); with behavioural and clinical factors (physical activity, smoking, hypertension, diabetes, obesity in the IPD; varied covariates in published studies) it shrinks to HR 0.85 (15% lower); with depression (IPD only, 8 cohorts) to HR 0.91 (9% lower)
• Very high heterogeneity (I2 = 98.47%); authors say the pooled number is an average across very different measures. Egger's test suggested publication bias (p = .004), though trim-and-fill gave a similar HR 0.75
• Effect much larger with yes/no (binary) measures (HR 0.62) than continuous scales (HR 0.85 per SD); published-literature samples stronger (0.71) than the authors' own IPD re-analysis (0.86)
• Behavioural/clinical factors may be mediators or confounders; the study cannot say which. The paper did not test whether raising purpose makes people live longer (only cites that purpose can be increased by interventions) -> no how-to

This meta-analysis pooled 25 groups with 488,765 adults from the US, Europe, Japan and Australia, followed for up to 32 years. People who rated their purpose in life higher had a 24% lower risk of dying during follow-up. After also accounting for habits and health problems like smoking, activity and diabetes, the risk was still 15% lower; after accounting for depression (8 cohorts), 9% lower. Observational: linked, not proven.

We read the abstract and the full text of this paper and checked every number on this page against it (17 facts, checked on 2026-10-29). The study design is named above. Cohort and other observational studies are described as linked, not proven. Found an error? Email theis@onestudyaday.com.