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Table 1 Table of demographics for the rheumatoid arthritis and healthy control groups

From: Possible rheumatoid arthritis subtypes in terms of rheumatoid factor, depression, diagnostic delay and emotional expression: an exploratory case-control study

  Rheumatoid arthritis Healthy control
Mean age (standard deviation) 49.3 (11.2) 41.5 (10.0)
Gender   
   male 44 (9.4%) 234 (46.8%)
   female 424 (90.6%) 266 (53.2%)
Education   
   basic 107 (23.3%) 62 (12.9%)
   technical 121 (26.3%) 85 (17.7%)
   university 232 (50.4%) 334 (69.4%)
Annual Income   
   <£ 25,000 204 (51.8%) 166 (39.2%)
   25,000 to 50,000 144 (36.5%) 153 (36.1%)
   >50,000 46 (11.7%) 105 (24.8%)
Ethnic origin   
   white (U.K.) 301 (64.6%) 310 (66.2%)
   white (other) 151 (32.4%) 81 (17.3%)
   other 14 (3.0%) 77 (16.5%)
Marital status   
   single 159 (34.0%) 86 (18.8%)
   married 305 (65.2%) 269 (58.7%)
   living together 42 (9.0%) 53 (11.6%)