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

Median household income (SD)

$42,412 (19,206)^a,b

$51,022 (19,878)^a

$51,459 (22,397)

  Percentage of residents with < high school education

25.1^a,b

16.4^a

17.8

  Percentage of residents with < college degree

74.3^a,b

65.3^a

66.8

  Proportion of residents with linguistic isolation

8.1^a,b

5.3^a

5.5

  White

72.6^a,b

80.7^a

80.3

  Latino

29.4^a,b

20.2^a

19.8

  Other race

15.4^a,b

10.5^a

9.9

  African American

7.9^a,b

3.9^a

5.0

  Asian/Pacific Islander

5.7^a,b

6.9^a

6.1

  American Indian

2.4^a,b

2.1^a

2.0