Table 1.
Patient Characteristics ( N = 15,973)
| Research Participation Index, mean (SD) | 13.7 (3.6) |
| Health literacy (BHLS), mean (SD) | 13.5 (2.1) |
| Subjective numeracy (SNS), mean (SD) | 14.3 (3.6) |
| Age, mean (SD) | 52.8 (16.5) |
| Household density, mean (SD) | 2.4 (1.2) |
| Participated in research previously, n (%) | |
| Yes | 4823 (32.4) |
| No | 10,057 (67.6) |
| Gender, n (%) | |
| Female | 10,199 (65.5) |
| Male | 5380 (34.5) |
| Race/ethnicity, n (%) | |
| White (non-Hispanic) | 12,827 (81.4) |
| Black (non-Hispanic) | 1675 (10.6) |
| Hispanic | 286 (1.8) |
| Native American | 243 (1.5) |
| Asian | 248 (1.6) |
| Other | 65 (0.4) |
| Multi-racial | 424 (2.7) |
| Education, n (%) | |
| Less than high school | 489 (3.1) |
| High school degree | 2213 (14.2) |
| Some college/2-year degree | 4448 (28.6) |
| College degree | 3898 (25.1) |
| More than a college degree | 4512 (29.0) |
| Income, n (%) | |
| Less than $10,000 | 631 (4.5) |
| $10,000 to $19,999 | 1081 (7.7) |
| $20,000 to $34,999 | 1904 (13.6) |
| $35,000 to $49,999 | 2032 (14.5) |
| $50,000 to $74,999 | 2883 (20.5) |
| $75,000 to $99,999 | 2139 (15.2) |
| $100,000 or more | 3376 (24.0) |
| Employment, n (%) | |
| Employed | 8907 (55.9) |
| Unemployed | 767 (4.8) |
| Retired | 3528 (22.1) |
| Unable to work (disabled) | 1394 (8.8) |
| Other (homemaker, stay-at-home caregiver, student, etc.) | 1333 (8.4) |
| Marital status, n (%) | |
| Married/living with partner | 10,938 (69.0) |
| Widowed | 860 (5.4) |
| Divorced/separated | 1986 (12.5) |
| Never married | 2075 (13.1) |
Missing counts for health literacy = 256; subjective numeracy = 282; age = 330; household density = 134; participated in previous research = 1093; gender 394; race = 372; education = 413; income = 1927; employment = 44; and marital status = 114