Table 4.

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

	Adjusted for smoking	Adjusted for smoking, socioeconomic status and BMI
	OR (95 % CI)	OR (95 % CI)
Total cholesterol, per SD	1.01 (0.81–1.24)	1.02 (0.80–1.30)
Total cholesterol–quartile 1*	0.92 (0.52–1.62)	0.82 (0.43–1.57)
Total cholesterol–quartile 2*	1.00 (ref.)	1.00 (ref.)
Total cholesterol–quartile 3*	0.95 (0.54–1.65)	0.99 (0.53–1.85)
Total cholesterol–quartile 4*	0.75 (0.42–1.44)	0.80 (0.41–1.57)

OR odds ratio, CI confidence interval, BMI body mass index, SD standard deviation

*Quartile 1: 3.1–5.0 mmol/l; quartile 2: 5.0–5.6 mmol/l; quartile 3: 5.6–6.3 mmol/l; quartile 4: 6.3–9.4 mmol