Table 1 Baseline characteristics of participants by rheumatoid arthritis (RA) status, NHANES 2003–2018 (N = 10,496)
Characteristic | Overall | Without RA | RA | p-value |
|---|---|---|---|---|
Age, mean (SE) | 47.03 (0.29) | 46.59 (0.30) | 57.52 (0.83) | < 0.0001 |
Age, n (%) | < 0.0001 | |||
20–39 | 3578 (36.76) | 3534 (37.83) | 44 (11.33) | |
40–59 | 3393 (38.23) | 3194 (38.02) | 199 (43.25) | |
≥ 60 | 3525 (25.01) | 3196 (24.15) | 329 (45.42) | |
BMI, mean (SE) | 28.98 (0.11) | 28.91 (0.11) | 30.47 (0.40) | < 0.001 |
BMI, n (%) | < 0.001 | |||
25–30.0 | 3509 (33.49) | 3350 (33.68) | 159 (28.90) | |
< 25 | 3020 (30.16) | 2892 (30.40) | 128 (24.51) | |
≥ 30.0 | 3967 (36.35) | 3682 (35.92) | 285 (46.59) | |
Sex, n (%) | < 0.001 | |||
Male | 5138 (48.75) | 4901 (49.20) | 237 (38.26) | |
Female | 5358 (51.25) | 5023 (50.80) | 335 (61.74) | |
Ethnicity, n (%) | < 0.0001 | |||
Non-Hispanic White | 4860 (70.79) | 4610 (70.91) | 250 (67.93) | |
Non-Hispanic Black | 2147 (10.35) | 1977 (10.05) | 170 (17.50) | |
Mexican American | 1646 (7.62) | 1563 (7.67) | 83 (6.34) | |
Other | 1843 (11.24) | 1774 (11.37) | 69 (8.23) | |
Educational attainment, n (%) | < 0.0001 | |||
< High school | 2541 (15.13) | 2357 (14.84) | 184 (21.93) | |
≥ High school | 7955 (84.87) | 7567 (85.16) | 388 (78.07) | |
PIR, n (%) | < 0.0001 | |||
≤ 1.30 | 3196 (20.26) | 2960 (19.88) | 236 (29.29) | |
1.31–3.50 | 3968 (35.76) | 3762 (35.62) | 206 (39.13) | |
> 3.5 | 3332 (43.97) | 3202 (44.50) | 130 (31.58) | |
Alcohol consumption, n (%) | < 0.0001 | |||
Never | 1488 (10.63) | 1393 (10.51) | 95 (13.50) | |
Former | 1866 (14.43) | 1721 (13.99) | 145 (24.93) | |
Mild | 3513 (36.60) | 3322 (36.63) | 191 (35.96) | |
Moderate | 1587 (17.38) | 1524 (17.65) | 63 (11.01) | |
Heavy | 2042 (20.96) | 1964 (21.23) | 78 (14.59) | |
Physical activity, n (%) | < 0.0001 | |||
No | 5077 (41.60) | 4712 (40.80) | 365 (60.62) | |
Yes | 5419 (58.40) | 5212 (59.20) | 207 (39.38) | |