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Table 2 Relative risk for developing anti-CP-positive RA or anti-CP-negative RA for men exposed to mineral oils

From: Association between occupational exposure to mineral oil and rheumatoid arthritis: results from the Swedish EIRA case–control study

Outcome Oil Exposed cases/controls (n) Relative riska 95% confidence interval Relative riskb 95% confidence interval
Anti-CP+ RA Cutting fluid 28/39 1.6 0.9–2.7 1.5 0.8–2.6
  Motor oil 57/84 1.5 1.0–2.2 1.5 1.0–2.3
  Hydraulic oil 56/72 1.8 1.2–2.7 1.7 1.1–2.6
  Form oil 16/24 1.5 0.7–2.9 1.4 0.7–2.9
  Asphalt 10/14 1.6 0.7–3.9 1.5 0.6–3.7
  Any mineral oil 93/132 1.6 1.1–2.2 1.6 1.1–2.2
Anti-CP- RA Cutting fluid 8/39 0.6 0.2–1.3 0.6 0.2–1.3
  Motor oil 27/84 0.9 0.6–1.5 0.9 0.6–1.5
  Hydraulic oil 27/72 1.0 0.6–1.7 1.0 0.6–1.7
  Form oil 9/24 1.1 0.5–2.6 1.1 0.5–2.6
  Asphalt 3/14 0.7 0.2–2.6 0.7 0.2–2.6
  Any mineral oil 42/132 1.0 0.6–1.5 1.0 0.6–1.5
  1. Relative risk and 95% confidence interval for developing antibodies to citrulline-containing peptides (anti-CP)-positive rheumatoid arthritis (RA) and anti-CP- RA for men 18–70 years old exposed to different kinds of mineral oils compared with unexposed men.
  2. aAdjusted for age and residential area.
  3. bAdjusted for age, residential area and smoking.