Table 1.
Baseline Characteristics of Study Participants, Stratified by Race, Overall and for Subgroups with Arthritis and Cardiovascular Disease, North Carolina, 2001
| Characteristica | White | African American | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| All (N = 3,612) | Arthritis Subgroup (n = 969) | CVD/HTN Subgroup (n = 1,271) | All (N = 953) | Arthritis Subgroup (n = 275) | CVD/HTN Subgroup (n = 469) | |
| Age, y (SD) | 47.8 (16.8)b | 58.2 (14.9)c | 58.1 (14.8)c | 45.9 (16.5)b | 56.7(14.6)c | 53.5 (14.7)c |
| BMI, kg/m2 (SD) | 28.7 (6.8)b | 29.7 (7.1)c | 30.4 (7)c | 31.7 (8.5)b | 33.0 (8.9)c | 33.1 (8.7)c |
| Men, % | 30.8b | 27.2c | 35.8c | 24.9b | 21.8 | 29.7c |
| Educationd, % | ||||||
| High | 53.6b | 44.3e | 42.6e | 39.4b | 26.9e | 28.4e |
| Middle | 29.9 | 29.5 | 32.4 | 31.5 | 24.6 | 29.1 |
| Low | 16.5 | 26.2 | 25.0 | 29.1 | 48.5 | 42.5 |
| Poverty levelf, % | ||||||
| Low | 33.3 | 29.8e | 29.7e | 33.1 | 34.3 | 34.4 |
| Middle | 33.4 | 33.6 | 36.2 | 33.5 | 34.3 | 31.0 |
| High | 33.3 | 36.6 | 34.2 | 33.4 | 31.4 | 34.6 |
| SF-12v2 scoreg (SD) | ||||||
| PCS | 45.0 (12.3)b | 35.6 (12.1)c | 39.3 (12.8)c | 42.4 (12.0)b | 34.6 (11.7)c | 39.1 (11.7)c |
| MCS | 47.7 (11.8)b | 46.5 (12.8)c | 47.7 (12) | 46.4 (11.7)b | 44.2 (12.5)c | 45.7 (11.7) |
| CDC HRQOL daysh (SD) | ||||||
| Physical | 8.1 (10.4)b | 13.7 (12.0)c | 11 (11.8)c | 9.1 (10.3)b | 14.8 (11.3)c | 11.5 (10.9)c |
| Mental | 6.9 (9.8) | 8.6 (10.7)c | 7.1 (10) | 7.5 (9.8) | 9.6 (10.9)c | 8.5 (10.4)c |
| Limited activity | 5.4 (9.2)b | 9.3 (11.5)c | 7 (10.4)c | 6.5 (9.7)b | 10.7 (11.7)c | 8 (10.7)c |
Abbreviations: CVD, cardiovascular disease; HTN, hypertension; BMI, body mass index; SF-12v2 PCS, Medical Outcomes Study's 12-Item Short Form Survey Physical Component Score; SF-12v2 MCS, Medical Outcomes Study's 12-Item Short Form Survey Mental Component Score; CDC HRQOL, Centers for Disease Control and Prevention Health Related Quality of Life.
When percentage is not shown, mean value is indicated. Mean values for people without arthritis or CVD/HTN are not depicted in the table.
Indicates significance at P < .05 for comparisons between the total white group and the total African American group.
Indicates significance at P < .05 using t tests for comparisons between people with arthritis and those without arthritis and comparisons between people with CVD/HTN and those without CVD/HTN.
Low is less than a high school diploma, middle is a high school diploma, and high is more than a high school diploma. High education level is the reference category.
Indicates significance at P < .05 using overall Pearson χ2 for comparisons between people with arthritis and those without arthritis and comparisons between people with CVD/HTN and those without CVD/HTN.
Block-group poverty level (percentage of the population in households with income below the poverty level) in tertiles that are race-specific with cut points: whites, 6.9% and 13.8%; African Americans, 11.8% and 21.3%.
The SF-12v2 yields 2 summary scores, PCS and MCS. Higher scores on the PCS and MCS indicate better health, and scores range from 0 to 100.
CDC HRQOL days indicate the number of days in the last 30 days that respondents suffered poor physical or mental health, or had limited activities because of poor mental or physical health.