Table 1

Characteristics of patients with rheumatoid arthritis (RA), non-RA controls, and healthy controls

Patients with RA

Non-RA controls

Healthy controls


Number

95

44

36


Female, percentage

68

57

56


Age in years (SD)

56 (11)

54 (9.7)

34 (15)


Current smoker, percentage

23

27

14


Former smoker, percentage

40

43

0


Body mass index

25.8 (4.9)

25.4 (4.4)

NA


Number of teeth

23.4 (6.3)

24.2 (4.9)

27.8 (2.9)


RA duration in years (SD)

7.4 (5.9)

0

0


DAS28 (SD)

2.4 (0.93)

0

0


Seropositive for IgM-RF, percentage

53

0

NA


Seropositive for ACPAs, percentage

71

NA

NA


Medication for RA, percentage


None

6

100

100


DMARDs

79

0

0


Anti-TNFα

15

0

0


ACPA, anti-citrullinated protein antibody; anti-TNFα, anti-tumor necrosis factor-alpha; DAS28, disease activity score 28 tender and swollen joint count; DMARD, disease-modifying anti-rheumatic drug; IgM-RF, immunoglobulin M-rheumatoid factor; NA, not assessed; SD, standard deviation.

Smit et al. Arthritis Research & Therapy 2012 14:R222   doi:10.1186/ar4061

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