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Table 1 Patient demographics and sample characteristics at baseline, including tests carried out prior to initial clinic visit by referring primary physician

From: The impact of rheumatologist-performed ultrasound on diagnosis and management of inflammatory arthritis in routine clinical practice

  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%)
  1. aAbbreviations: anti-CCP = anti-cyclic citrullinated peptides; CRP = C-Reactive Protein; ESR = Erythrocyte sedimentation rate; FBC = full blood count; ANA = antinuclear antibodies
  2. bMost commonly liver function, renal function and bone profile