Table 1.
Patient demographics and sample characteristics at baseline, including tests carried out prior to initial clinic visit by referring primary physician
| US | Non-US | RA US | RA Non-US | |
|---|---|---|---|---|
| Total no. Patients | 134 | 124 | 56 | 58 |
| Mean (standard deviation) age (years) at initial clinic visit | 51.28 (15.75) |
53.12 (17.34) |
54.42 (17.21) |
54.19 (17.75) |
| N (%)Male | 42 (31%) | 43 (35%) | 17 (30%) | 14 (24%) |
| N (%) Female | 92 (69%) | 81 (65%) | 39 (70%) | 44 (76%) |
| Median (IQR) time (months) from onset of symptoms to first clinic visit | 5.98 (3.66 to 14.26) |
5.26 (2.89 to 7.62) |
5.36 (3.61 to 12.87) |
4.78 (3 to 10.56) |
| Tests carried out prior to initial clinic visit by referring GPa | ||||
| N (%) Rheumatoid Factor | 82 (61%) | 81 (65%) | 42 (75%) | 45 (78%) |
| N (%) Anti-CCP | 8 (6%) | 9 (7%) | 4 (7%) | 6 (10%) |
| N (%) CRP | 90 (67%) | 78 (63%) | 42 (75%) | 36 (62%) |
| N (%) ESR | 92 (69%) | 84 (68%) | 40 (71%) | 41 (71%) |
| N (%) FBC | 98 (73%) | 74 (60%) | 41 (73%) | 40 (69%) |
| N (%) Joint x-ray (any joint) | 39 (29%) | 37 (30%) | 17 (30%) | 18 (31%) |
| ANA | 51 (38%) | 54 (44%) | 26 (46%) | 28 (48%) |
| Otherb | 67 (50%) | 60 (48%) | 27 (48%) | 28 (48%) |
aAbbreviations: anti-CCP = anti-cyclic citrullinated peptides; CRP = C-Reactive Protein; ESR = Erythrocyte sedimentation rate; FBC = full blood count; ANA = antinuclear antibodies
bMost commonly liver function, renal function and bone profile