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Table 2 Characteristics of patients in residential census tracts stratified by type of medicare part D coverage (n = 344,817)

From: Patterns of prescription drug expenditures and medication adherence among medicare part D beneficiaries with and without the low-income supplement

  LIS N = 25,226 Non-LIS/GC N = 29,289 Non-LIS/Non-GC N = 290,302
Median household income (SD) $42,412 (19,206)a,b $51,022 (19,878)a $51,459 (22,397)
Education level (%)
  Percentage of residents with < high school education 25.1a,b 16.4a 17.8
  Percentage of residents with < college degree 74.3a,b 65.3a 66.8
  Proportion of residents with linguistic isolation 8.1a,b 5.3a 5.5
Race/Ethnicity (%)
  White 72.6a,b 80.7a 80.3
  Latino 29.4a,b 20.2a 19.8
  Other race 15.4a,b 10.5a 9.9
  African American 7.9a,b 3.9a 5.0
  Asian/Pacific Islander 5.7a,b 6.9a 6.1
  American Indian 2.4a,b 2.1a 2.0
  1. SD: standard deviation.
  2. aSignificantly different from the Non-LIS/Non-GC group (p <0.05).
  3. bSignificantly different from the Non-LIS/GC group (p <0.05).