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Table 3 Relative risk of developing rheumatoid arthritis for subjects reporting exposure to cosmetics

From: Usage of skin care products and risk of rheumatoid arthritis: results from the Swedish EIRA study

Exposure Number of exposed cases/controls Relative riska 95% confidence interval Relative riskb 95% confidence interval
Women      
   A 104/118 1.0 Reference 1.0 Reference
   B 178/174 1.1 0.8 to 1.6 1.0 0.7 to 1.5
   C 178/230 0.9 0.6 to 1.2 0.8 0.6 to 1.2
   D 319/370 1.0 0.7 to 1.3 0.9 0.6 to 1.2
   E 233/294 0.9 0.6-1.2 0.8 0.5 to 1.1
Men      
   A 315/359 1.0 Reference 1.0 Reference
   B 53/78 0.7 0.5 to 1.1 0.8 0.5 to 1.2
   C 22/27 0.8 0.5 to 1.5 0.9 0.5 to 1.6
   D 12/13 1.1 0.5 to 2.5 1.1 0.5 to 2.5
   E 4/6 0.9 0.2 to 3.2 0.6 0.1 to 2.6
All      
   A 419/477 1.0 Reference 1.0 Reference
   B 231/252 0.9 0.7 to 1.2 0.9 0.7 to 1.2
   C 200/257 0.9 0.7 to 1.2 0.8 0.6 to 1.1
   D 331/383 1.0 0.7 to 1.3 0.9 0.7 to 1.2
   E 237/300 0.9 0.6 to 1.2 0.8 0.5 to 1.1
  1. Relative risk together with 95% confidence interval of developing rheumatoid arthritis overall for subjects 18 to 70 years old reporting different amounts of exposure to cosmetics compared with those low exposed (A), by gender.
  2. aAdjusted for age, living area and gender where appropriate. bAdjusted for age, living area, gender, socio-economic status and smoking where appropriate.