YouLiveLong guide
Sources and data provenance
Primary datasets and research used by YouLiveLong, including exact versions, retrieval dates, fields, and transformations.
Baseline dataset
U.S. Social Security Administration
Table 4.C6 — Period life table, 2022
Published in the Annual Statistical Supplement, 2025. Retrieved August 21, 2026. Fields: exact age, probability of death, survivors out of 100,000, and life expectancy, by sex. Transformation: qx drives conditional and adjusted survival; published ex is retained for fixture checks. U.S. government publication; source provenance retained.
Open primary source ↗Lifestyle evidence
- Arem et al., JAMA Internal Medicine (2015) — leisure-time physical activity and mortality.
- Cappuccio et al., Sleep (2010) — sleep duration and all-cause mortality meta-analysis.
- Global BMI Mortality Collaboration, Lancet (2016) — BMI and all-cause mortality.
- Aune et al., Frontiers in Cardiovascular Medicine (2021) — hypertension and all-cause mortality.
- Li et al., Circulation (2018) — combined low-risk lifestyle factors and life expectancy.
- Holt-Lunstad et al., PLOS Medicine (2010) — social relationships and mortality.
- DeSalvo et al., Journal of General Internal Medicine (2006) — self-rated health and mortality meta-analysis.
- WHO Global Health Estimates — healthy life expectancy context only.
Exact coefficients are published inside the downloadable application source at /assets/model.js and summarized on the methodology page.
Geographic datasets
World Bank
World Development Indicators, 2024
Indicators: SP.DYN.LE00.IN (total), SP.DYN.LE00.MA.IN (male), and SP.DYN.LE00.FE.IN (female). Retrieved August 22, 2026 through the World Bank Indicators API. License: CC BY 4.0. A single common year is used; regional aggregates are excluded from country rankings; missing values are not estimated.
Open source ↗CDC / National Center for Health Statistics
U.S. State Life Tables, 2022
Official 2022 life expectancy at birth for total, male, and female populations in all 50 states and D.C. The U.S. reference values come from the corresponding NCHS national 2022 publication. Retrieved August 22, 2026. State names are matched exactly and ranks are generated from the 51 jurisdictions.
Open source ↗