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. Author manuscript; available in PMC: 2013 Dec 2.
Published in final edited form as: Arch Intern Med. 2010 Jan 11;170(1):10.1001/archinternmed.2009.454. doi: 10.1001/archinternmed.2009.454

Table 2.

Characteristics of Study Sample.

Variable All
Participants
(N=500)
Health Literacy
P Value
Low
(n=101)
Marginal
(n=160)
Adequate
(n=239)
Age, Mean (SD) 48.9 (14.4) 48.1(13.3) 45.6(14.6) 51.5(14.2) <0.001
Male, % 39.6 44.6 38.8 38.1 0.34
Race, % <0.001
 African American 63.6 90.1 83.1 39.3
 White 32.8 6.9 15.0 55.7
 Other 3.6 3.0 1.9 5.0
Education, % <0.001
 < High School 19.4 37.0 30.0 5.0
 High School Grad/GED 33.2 54.0 36.2 22.7
 Some College 20.4 7.0 21.9 25.1
 ≥ College Graduate 26.6 2.0 11.9 47.1
Medications Taken Daily, Mean
(SD)
2.9 (3.1) 2.8(3.5) 2.6(2.9) 3.1(3.1) 0.05
Site, % 0.002
 Chicago, IL 50.0 31.7 54.4 54.8
 Shreveport, LA 50.0 68.3 45.6 45.2
Practice Setting, % <0.001
 Academic 50.0 33.7 33.1 68.2
 Community 50.0 66.3 66.9 31.8