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Table 1 Demographics of the eligible population at cohort baseline

From: Disease activity flares and pain flares in an early rheumatoid arthritis inception cohort; characteristics, antecedents and sequelae

 

Categories or possible range

Eligible population

DAS28 Flare

Pain Flare

n

 

719

323

377

Sex

% Female

69%

68%

70%

Age (y)

 

56 (14)

57 (13)

56 (13)

Smoking

% Current Smoker

33%

30%

34%

% Ex-smoker

24%

25%

26%

Body mass index (kg/m2)

 

27.7 (5.4)

27.5 (5.3)

27.8 (5.6)

DAS28-ESR

 

4.8 (1.5)

4.5 (1.6)

4.6 (1.6)

Erythrocyte Sedimentation Rate (mm/h)

 

30 (24)

28 (23)

31 (24)

Swollen joint count

0–28

6 (6)

6 (6)

6 (6)

Tender joint count

0–28

8 (7)

7 (7)

7 (7)

Visual analogue scale (mm)

0–100

46 (25)

43 (25)

44 (26)

Seropositive

 

58%

59%

58%

SF36 Bodily Pain

0–100

33 (11)

33 (11)

34 (11)

SF36 Vitality

0–100

41 (11)

42 (11)

42 (11)

SF36 Mental Health

0–100

46 (11)

47 (11)

47 (11)

HAQ

0–3

1.2 (0.9)

1.1 (0.8)

1.1 (0.7)

  1. Baseline demographics at recruitment of participants who were eligible for this analysis by having at least 2 consecutive measurements of DAS28 and SF36-Bodily Pain (Eligible population) and the subgroups who were classified as experiencing flares. Seropositive; for rheumatoid factor or anti-citrullinated peptide according to local laboratory reference ranges. Mean (sd) or percent