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Table 2 Predictors of rheumatoid arthritis: bivariate conditional logistic regression analysis, stratified by sex

From: High serum cholesterol predicts rheumatoid arthritis in women, but not in men: a prospective study

  Women Men
OR (95 % CI) OR (95 % CI)
Current non-smoking 1.00 (ref.) 1.00 (ref.)
Current smoking 1.61 (1.04–2.49) 1.97 (1.29–3.02)
White-collar worker 1.00 (ref.) 1.00 (ref.)
Blue-collar worker 1.45 (0.97–2.27) 1.63 (1.05–2.53)
Normal/late menopause (at age ≥46 years) 1.00 (ref.) NA
Early menopause (at age <46 years)* 1.67 (0.85–3.21) NA
BMI, per SD 1.02 (0.84-1.28) 0.72 (0.58-0.89)
Total cholesterol, per SD 1.54 (1.22–1.94) 1.03 (0.83–1.26)
Total cholesterol, per quartile Quartile 1** 1.19 (0.62–2.27) 0.84 (0.48–1.48)
Quartile 2** 1.00 (ref.) 1.00 (ref.)
Quartile 3** 1.74 (0.93–3.26) 0.92 (0.53–1.59)
Quartile 4** 3.09 (1.67–5.72) 0.74 (0.42–1.32)
Triglycerides, per quartile Quartile 1*** 0.65 (0.36–1.17) 1.54 (0.80–2.69)
Quartile 2*** 1.00 1.00
Quartile 3*** 0.62 (0.34–1.15) 0.94 (0.53–1.67)
Quartile 4** 1.23 (0.69–2.02) 0.93 (0.52–1.66)
  1. OR odds ratio, CI confidence interval, NA not applicable, SD standard deviation, BMI body mass index
  2. *Data available from 84 female cases and 334 controls
  3. **Total cholesterol: quartile 1: women 2.9–4.9, men 3.1–5.0 mmol/l; quartile 2: women 4.9–5.6, men 5.0–5.6 mmol/l
  4. Quartile 3: women 5.6–6.5, men 5.6–6.3 mmol/l; quartile 4: women 6.5–9.7, men: 6.3–9.4 mmol/l
  5. ***Triglycerides: quartile 1: women 0.30–0.73, men 0.18–0.96 mmol/l; quartile 2: women 0.73–0.95, men 0.96–1.29 mmol/l
  6. Quartile 3: women 0.95–1.35, men 1.29–1.76 mmol/l; quartile 4: women 1.35–4.75, men: 1.76–5.32 mmol/l