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Table 4 Ethnic variation in prevalence of rheumatoid arthritis: studies using two-stage screening

From: Risk for rheumatic disease in relation to ethnicity and admixture

    Prevalence/1000
Ethnic origin Location Age (years) Males Females Both
Pima Arizona, USA [31] >20 10 31  
Yakima Washington, USA [33] 18–79 N/A 34  
European Minnesota, USA [35] 35–85 7.4 14  
European and Afro-American NHANES, USA [30] 18–79 6 15  
European Manchester, UK [36] 45–65    8
Afro-Caribbean Manchester, UK [36] 44–66    2.9
  1. NHANES, National Health and Nutrition Examination Survey.