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. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Arthritis Rheum. 2008 Jul;58(7):1958–1967. doi: 10.1002/art.23596

Table 1.

Selected demographic and disease-related characteristics of the patients in the ESCAPE RA cohort*

All
patients
(n = 129)		 PAD-4–
negative
patients
(n = 83)		 PAD-4–
positive
patients
(n = 46)
Age, mean ± SD years 59.4 ± 8.1 59.2 ± 8.0 59.7 ± 8.4
Sex, % female 63.6 62.7 65.2
Ethnicity, %
     White 86.0 84.3 89.1
     African American 8.6 12.0 2.2
     Asian 3.1 3.6 2.2
     Other 2.3 6.5
Body mass index, mean ± SD kg/m2 28.5 ± 5.8 28.9 ± 5.7 27.9 ± 6.0
Disease duration, mean ± SD years 12.5 ± 10.5 10.3 ± 9.7 16.3 ± 10.9†
Shared epitope status, %
     None 30.2 37.3 17.4
     Heterozygous 50.4 45.8 58.7
     Homozygous 19.4 16.9 23.9
CRP level, mg/liter
     Mean ± SD 6.8 ± 14.2 5.9 ± 13.0 8.4 ± 16.2
     Median 2.7 2.1 3.9
*

ESCAPE RA = Evaluation of Subclinical Cardiovascular Disease and its Predictors of Events in Rheumatoid Arthritis; PAD-4 = peptidyl arginine deiminase type 4; CRP = C-reactive protein.

†

P = 0.002 versus PAD-4–negative patients.