Table 3.

Impact of total cholesterol on the risk of rheumatoid arthritis in women: multivariate analyses

	Adjusted for smoking	Adjusted for smoking and early menopause	Adjusted for smoking, early menopause and socioeconomic status
	OR (95 % CI)	OR (95 % CI)	OR (95 % CI)
Total cholesterol, per SD	1.47 (1.16–1.86)	1.44 (1.13–1.83)	1.42 (1.08–1.86)
Total cholesterol–quartile 1*	1.11 (0.57–2.16)	1.12 (0.58–2.18)	1.44 (0.69–3.04)
Total cholesterol–quartile 2*	1.00 (ref.)	1.00 (ref.)	1.00 (ref.)
Total cholesterol–quartile 3*	1.71 (0.90–3.24)	1.70 (0.89–3.23)	2.34 (1.13–4.81)
Total cholesterol–quartile 4*	2.72 (1.44–5.14)	2.62 (1.37–4.99)	2.79 (1.22–5.87)

OR odds ratio, CI confidence interval, SD standard deviation

*Quartile 1: 2.9–4.9 mmol/l; quartile 2: 4.9–5.6 mmol/l; quartile 3: 5.6–6.5 mmol/l; quartile 4: 6.5–9.7 mmol/l