Table 1

Demographic features of study groups

Group

Age (yrs)

ANA (EU)

Female (%)

AA (%)

Hispanic (%)

HC High ANA (n = 18)

33.8 ± 3.4*

78.4 ± 10.0*

83

22

6

HC Low ANA (n = 16)

43.1 ± 3.7

7.0 ± 0.6

75

25

0

SLE (n = 14)

38.0 ± 4.0

182.4 ± 15.4

93

43

7

P**

0.2

0.001^#

0.4

0.4

0.6

*Values represent mean and standard error of the mean. **P-values were calculated by one-way ANOVA or Fisher's exact test. ^# Mean ANA in SLE was significantly higher than in the High ANA HC group (P <0.05). ANA, antinuclear antibodies; SLE, systemic lupus erythematosus.

Li et al. Arthritis Research & Therapy 2011 13:R38   doi:10.1186/ar3271