In Reply Our study1 on inequalities in life expectancy found that a combination of socioeconomic and race/ethnicity factors, behavioral and metabolic risk factors, and health care factors could explain 74% of the variation in life expectancy among counties. We agree with Dr Mestral that other factors such as diet quality and housing conditions may play a role in explaining the remaining variation. This is an important area of future research and will require identifying appropriate county-level data sources that relate to these factors.
Mokdad AH, Dwyer-Lindgren L, Murray CJL. Considerations for County-Level Inequalities in Life Expectancy—Reply. JAMA Intern Med. 2017;177(11):1698. doi:10.1001/jamainternmed.2017.5858
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