Table 1.
Baseline characteristics
| All patients, N = 198 | RA alone, N = 173 | RA with FM, N = 25 | P values | |
|---|---|---|---|---|
| Age, mean (s.d.), years | 58.1 (11.1) | 57.9 (11.4) | 58.9 (9.0) | 0.691a |
| Female, n (%) | 168 (85) | 146 (84) | 22 (88) | 0.773b |
| Duration of RA, mean (s.d.), years | 15.9 (9.2) | 15.9 (9.2) | 15.8 (9.4) | 0.969a |
| BMI, mean (s.d.), kg/m2 | 26.9 (5.7) | 26.5 (5.5) | 29.4 (6.6) | 0.024a |
| Positive RF, n (%)c,d | 124 (63) | 113 (66) | 11(46) | 0.059b |
| Positive anti-CCP antibody, n (%)c,e | 120 (62) | 106 (63) | 14 (56) | 0.495b |
| RA by 1987 ACR criteria, n (%) | 195 (98) | 171 (99) | 24 (96) | 0.334b |
| Taking biologic DMARD, n (%) | 120 (61) | 106 (61) | 14 (56) | 0.614b |
| Taking MTX, n (%) | 99 (50) | 92 (53) | 7 (28) | 0.019b |
| Taking prednisone, n (%) | 31 (16) | 27 (16) | 4 (16) | 1.000b |
| Taking non-biologic DMARD, n (%) | 122 (62) | 112 (65) | 10 (40) | 0.017b |
| Taking biologic DMARD and MTX, n (%) | 59 (30) | 53 (31) | 6 (24) | 0.498b |
| Taking biologic DMARD and non-biologic DMARD, n (%) | 67 (34) | 60 (35) | 7 (28) | 0.509b |
| Taking neither biologic nor non-biologic DMARD, n (%) | 24 (12) | 16 (9.2) | 8 (32) | 0.004b |
at-test or Wilcoxon rank-sum test.
bPearson chi-squared or Fisher’s exact test.
cMissing values were excluded from analysis.
dAll patients N = 196, RA N = 172, RA and FM N = 24.
eAll patients N = 193, RA N = 168, RA and FM N = 25.