Life expectancy is strongly linked to a relatively new metric that assesses physical, emotional, and social health, according to a Yale-led study. Referred to as population well-being, the metric is an important indicator that researchers and policy makers can use to promote health and address disparities, said the authors.

The study was published Nov. 9 in the November issue of Health Affairs.

Life expectancy varies significantly across counties in the United States. These geographic variations — which can be as much as 18 years for men born in different counties — are partly explained by socioeconomic status and race.

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