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June 17, 2009

Association Between Altitude and Mortality in Incident Dialysis Patients

JAMA. 2009;301(23):2442-2443. doi:10.1001/jama.2009.841

To the Editor: The retrospective cohort study by Dr Winkelmayer and colleagues1 suggested an inverse relationship between increasing altitude and all-cause mortality among US dialysis patients after adjusting for age, sex, and race in the dialysis population. Race and ethnicity have been shown to be associated with differences in all-cause and disease-specific mortality.2,3 In addition to differences in risk factors and genetic influences, mortality rates reflect in part racial and ethnic differences associated with health care access and quality.4

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