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Table 1 Demographic data and clinical predictors of ExRA

From: The impact of HLA-DRB1genes on extra-articular disease manifestations in rheumatoid arthritis

 

ExRA

Non-ExRA

P

Number

159

178

 

Age at RA diagnosis (years; mean ± SD)

50.1 ± 14.4

50.4 ± 14.8

0.87

Disease duration (years; mean ± SD)

11.3 ± 11.2

12.5 ± 11.3

0.34

Male/female (n)

75/84

66/112

0.06

RF positivea (%)

87.2

58.3

<0.0001

ANA positiveb (%)

60.8

33.8

<0.0001

  1. aInformation available for 149 extra-articular rheumatoid arthritis (ExRA) and 163 non-ExRA patients.
  2. bInformation available from 120 ExRA and 151 non-ExRA patients. ANA, antinuclear antibody; RA, rheumatoid arthritis; RF, rheumatoid factor; SD, standard deviation.