Table 4.
Descriptive characteristics in subjects with rheumatoid arthritis who participated in the study compared to non-participants
| Characteristic | Participants (n=232) | Non-Participants (n=169) | p-value |
|---|---|---|---|
| Age, years, mean ± SD | 58.8 ± 12.8 | 60.3 ± 15.2 | 0.27 |
| Female, n (%) | 174 (75) | 132 (78) | 0.47 |
| Race, n (%) | 0.51 | ||
| White | 218 (93) | 148 (88) | |
| Asian/Pacific Islander | 6 (3) | 9 (5) | |
| Other* | 3 (1) | 5 (3) | |
| Unknown | 5 (2) | 7 (4) | |
| Ever Married | 209 (90) | 154 (91) | 0.73 |
| Education level | <0.001 | ||
| < High school | 4 (2) | 16 (10) | |
| High school | 65 (28) | 65 (39) | |
| Technical school/college | 145 (63) | 77 (46) | |
| Graduate school | 17 (7) | 10 (6) | |
| Duration of RA, years, mean ± SD | 8.8 ± 6.2 | 9.8 ± 7.5 | 0.13 |
| RF positive, n (%) | 151 (65) | 111 (66) | 0.90 |
| Smoking (current or former), n (%) | 101 (44) | 99 (59) | 0.003 |
| Ever BMI >30 kg/m2, n (%) | 114 (49) | 82 (49) | 0.90 |
| Hypertension, n (%) | 194 (84) | 145 (86) | 0.55 |
| Diabetes Mellitus, n (%) | 27 (12) | 28 (17) | 0.16 |
| Dyslipidemia, n (%) | 163 (70) | 110 (65) | 0.27 |
*
includes Native American, Black, and subjects reporting more than one race
RA = rheumatoid arthritis; BMI = body mass index; SD = standard deviation; RF = rheumatoid factor