Table 1

Demographic characteristics of patients

Number of patients

Age (years)

Female/male


Healthy control

85

33 (27 to 44)

74/11

SLE

65

31 (25 to 42)

59/6

pSS

25

42 (31 to 51)

24/1

RA

65

NA

NA


Values for age are expressed as median (25th to 75th percentile). There were no significant differences between patients with SLE and healthy donors in terms of age and sex. NA indicates not available. pSS, primary Sjögren syndrome; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus.

Chen et al. Arthritis Research & Therapy 2011 13:R9   doi:10.1186/ar3230

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