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Table 1 Patient characteristics

From: Decreased plasma levels of soluble CD18 link leukocyte infiltration with disease activity in spondyloarthritis

Characteristics

At time of inclusion

At follow-up

HCs

 

(n = 84)

(n = 43)

(n = 28)

Age in years (mean)

37 (35-39)

41 (38-43)

42.9

Gender, percentage female

58

59

57

Diagnosis, percentage of patients

   

 Ankylosing spondylitis

19

19

-

 Psoriatic arthritis

11

12

-

 Enteropathic arthritis

4

5

-

 Reactive arthritis

15

17

-

 Undifferentiated SpA

51

47

-

HLA-B27, percentage positive

60

55

-

Disease duration in years (mean) a

8.0 (7.0-9.0)

12.6 (9.8-15)

-

Treatment, percentage of patients

   

 No

67

-

-

 MTX

8

-

-

 Salazopyrin

11

-

-

 Anti-TNFα

7

12

-

Self-assessment scores

  

-

 BASDAI, 0-100 (mean)

32 (26-37)

35 (28-42)

-

 BASFI, 0-100 (mean)

20 (16-25)

22 (16-28)

-

 Patient pain, 0-100 (mean)

32 (26-38)

33 (26-41)

-

 Patient global, 0-100 (mean)

32 (26-38)

31 (23-38)

-

 Level of morning stiffness, 0-100 (mean)

36 (29-43)

36 (27-44)

-

 Duration of morning stiffness, 0-100 (mean)

33 (26-41)

29 (20-38)

-

Clinical scores

   

 BASMI, 0-100 (median)

0 (0-0)

0 (0-10)

-

 Physician global, 0-100 (mean)

16 (13-20)

20 (16-25)

-

 Thoracic chest expansion in cm (mean)

4.1 (3.9-4.4)

4.9 (4.5-5.3)

-

Test results

   

 CRP in mg/L (median)

2.1 (1.3-3.9)

1.0 (0.5-2.5)

 

 SIJ MRI activity, 0-40 (mean)

7.5 (5.9-9.0)

4.3 (2.9-5.7)

-

 Spine MRI activity, 0-81 (median)

1 (0-4)

1 (0-2)

-

 SIJ MRI chronicity, 0-48 (mean)

15 (12-18)

17 (13-22)

-

 Spine MRI chronicity, 0-207 (median)

0 (0-4)

0 (0-5)

-

  1. Numbers in parentheses are 95% confidence interval for measures with a Gaussian distribution and 25% to 75% percentiles for measures with a non-Gaussian distribution. aDisease duration was defined as duration since start of symptoms. -, not available; Anti-TNF-α, anti-tumor necrosis factor-alpha; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; BASMI, Bath Ankylosing Spondilitis Metrology Index; CRP, C-reactive protein; HC, healthy control; MRI, magnetic resonance imaging; MTX, methotrexate; SIJ, sacroiliac joint; SpA, spondyloarthritis.