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Table 1 Demographic characteristics of Medicare cohort, 2000–2016

From: Emulating causal dose-response relations between air pollutants and mortality in the Medicare population

Characteristics No. %
Population 74,537,533 100
Total person-years 637,207,589  
Average years of follow-up 8.5  
Death 30,209,831 40.5
Female 41,295,065 55.4
Race
 White 62,622,921 84.0
 Black 6,638,467 8.9
 Other 5,276,145 7.1
Age at cohort entry
 65–74 58,425,025 78.4
 75–84 11,966,830 16.1
  ≥ 85 4,145,678 5.5
Enrollment in Medicaid 13,788,978 18.5