Table 1 Characteristics of the study population
From: An expansion of rare lineage intestinal microbes characterizes rheumatoid arthritis
|  | RA (n = 40) | Control (n = 32) |
|---|---|---|
Age, years, mean (median) | 55.7 (54) | 53.0 (52) |
Female | 70Â % | 81Â % |
BMI, mean (median), IQR | 30.4 (30.1), 23.1–33.1 | 30.9 (30.6), 23.9–32.4 |
HLA-DR4 | 60Â % | NA |
Disease activity parameters | ||
 Disease duration, months, mean (median) | 81.6 (47.5) |  |
 DAS28, mean (median), IQR | 3.2 (2.6), 0–4.3 |  |
 HAQ, mean (median), IQR | 0.6 (0.5), 0.1–1.1 |  |
 ESR, mm/h, mean (median), IQR | 18.5 (11), 5–23 |  |
 CRP, mg/l, mean (median), IQR | 12.7 (3.6), 3–8.6 |  |
 Patient VAS pain, mm, mean (median), IQR | 37.3 (28.0), 12.8–49.5 |  |
 TJC-28, mean (median), IQR | 4.2 (1), 0–6 |  |
 SJC-28, mean (median), IQR | 4.3 (2), 0–8 |  |
Autoantibody status | ||
 RF-positive | 100 % |  |
 ACPA-positive | 83 % |  |
 RF titer, kU/l, mean (median), IQR | 113 (63), 15–164 |  |
 ACPA titer, kAU/l, mean (median), IQR | 110 (99), 16–250 |  |
Medication use | ||
 Hydroxycholorquine | 25.0 % |  |
 Methotrexate | 61.2 % |  |
 Prednisone | 48.9 % |  |
 Biological agent | 34.0 % |  |