Table 1 Baseline characteristics of early diagnosed untreated rheumatoid arthritis patients and healthy controls

Number

43

14

Female (n (%))

30 (69.7)

9 (64.2)

Age (years) ^a,b,c

61 (22–78)

62.5 (35–72)

Symptom duration (months) ^a,b,d

6 (2–23)

ND

CRP (mg/L) ^a,b

9.1 (0.3–152)

ND

ESR (mm/hour) ^a,b

26 (5–108)

ND

Swollen joint count of 66 ^a,b

11 (2–30)

ND

Tender joint count of 68 ^a,b

14 (3–47)

ND

Swollen joint count of 28 ^a,b

9 (2–22)

ND

Tender joint count of 28 ^a,b

9 (0–27)

ND

DAS28-CRP ^a,b

5.1 (2.7–8)

ND

DAS28-ESR ^a,b

5.3 (2.6–8.4)

ND

CDAI ^a,b

28.1 (11.8–62.1)

ND

ACPA ≥20 IU/ml (n (%))

34 (79)

ND

RF ≥20 IU/ml (n (%))

33 (77)

ND

ACPA ≥20 IU/ml + RF ≥20 IU/ml (n (%))

30 (70)

ND

ACPA <20 IU/ml + RF <20 IU/ml (n (%))

5 (12)

ND