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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: J Autoimmun. 2010 Mar 11;35(1):52–57. doi: 10.1016/j.jaut.2010.02.001

Table 1.

Demographic characteristics of the study participants

Index cases
(n = 1071)
Total FDRs
(n = 4612)
Affected FDRs
(n = 497)
Female (%) 961(89.7) 2320 (50.3) 318 (63.9)
Ethnicity
 White (%) 821(76.7) 3459 (75.0) 362 (72.8)
 Hispanic (%) 115 (10.7) 558 (12.1) 70 (14.1)
 African American (%) 94 (8.8) 461 (10.0) 55 (11.1)
 Other (%) 41 (3.8) 134 (2.9) 10 (2.0)
Mean age, years (SD) 58.1 (13.8) 65.9 71.1