Greater mortality variability in the United States in comparison with peer countries.
Level 3 - non-randomized controlled study
Longitudinal comparative demographic trend analysis (1980–2016 across 17 countries); graded by non-clinical design analogy.
PubMed 32943979 · doi:10.4054/demres.2020.42.36
What was done
The authors evaluated trends in mortality rates and mortality variability across the United States and 16 peer high-income countries between 1980 and 2016. Using life table data from the Human Mortality Database, they applied demographic techniques to examine dispersion across survivorship, specifically focusing on the interquartile range (IQR), interdecile range (IDR), and intercentile range (ICR).
What was found
The abstract reports findings qualitatively without numerical estimates. Relative to peer high-income countries, US mortality rankings dropped for nearly all age groups, its older-age mortality advantage declined, relative age-specific mortality gaps grew from infancy through midlife, and deaths were more heavily concentrated from infancy through adulthood, leading to substantially higher mortality variability in the United States.
Why it matters
This study demonstrates that lagging US life expectancy is coupled with wide lifespan inequality driven by high premature mortality. It indicates that public health monitoring and policy interventions should target early and midlife mortality to reduce years of life lost and lifespan variability.
Limits
The abstract provides no point estimates, numerical rates, variance metrics, or confidence intervals. The analysis is macro-level across national populations and does not examine specific causes of death or subnational disparities by race, socioeconomic status, or region. Data series ended in 2016.
Cited by
- supports The premature death rate in the United States is nearly twice the average of comparable peer nations.