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Table 1 Baseline patient characteristics

From: Vitamin D and early rheumatoid arthritis

 

All

RA

UIA

CSA

Other

No. patients

790

368

139

169

114

Age*, years mean (SD)

52.4 (15.5)

55.5 (15.2)

51.4 (15.4)

46.3 (13.7)

52.3 (16.5)

Missing (no.)

n = 0

n = 0

n = 0

n = 0

n = 0

Sex, % female

64.3

68.8

59.0

72.8

43.9

Missing (no.)

n = 0

n = 0

n = 0

n = 0

n = 0

Ethnicity,%

 White British

60.7

58.2

59.7

60.4

71.1

 White Other

4.7

4.6

3.6

6.6

3.5

 Asian or Asian British

20.4

20.4

22.3

21.9

15.8

 Black or Black British

7.8

9.0

10.8

4.8

5.3

 Other

2.7

2.8

2.8

3.6

0.9

Missing or not stated (no.)

n = 27

n = 18

n = 1

n = 4

n = 4

Smoking status, %

 Current

19.9

20.5

18.7

21.3

18.4

 Previous

31.5

29.9

34.5

28.4

37.8

 Never

47.2

49.2

45.3

49.7

43.2

 Missing (no.)

n = 8

n = 2

n = 2

n = 1

n = 3

BMI, kg/m2 mean (SD)

28.7 (6.4)

28.7 (6.5)

28.0 (5.6)

28.9 (7.1)

29.5 (6.1)

Missing (no.)

n = 41

n = 24

n = 5

n = 8

n = 4

Symptom duration*,days median (IQR)

26.0 (13.3–54.4)

24.1 (13.0–52.2)

24.1 (13.0–57.0)

34.0 (18.0–70.1)

25.7 (10.5–55.7)

Missing (no.)

n = 12

n = 7

n = 1

n = 2

n = 2

  1. C current, CSA clinically suspect arthralgia, N never, no. number of cases, P previous, RA rheumatoid arthritis, SD standard deviation, UIA unclassified inflammatory arthritis
  2. * denotes statistically significant difference between groups (p < 0.001, Kruskall Wallis test)