Table 2.

Relationship between red meat with onset age of RA in different models.

	β	95% CI	p
Red meat (< 100 g/day, reference group)	–	–	–
Crude modela	− 3.20	− 5.88 to − 0.53	0.0193
Model 1b	− 5.59	− 8.69 to − 2.50	0.0004
Model 2c	− 6.14	− 9.20 to − 3.08	< 0.0001
Model 3d	− 6.46	− 9.77 to − 3.15	0.0001

RA rheumatoid arthritis.

^aCrude model: we did not adjust other covariates.

^bModel 1 adjusted for: drinking, smoking, sex; BMI; family history, nationality.

^cModel 2 adjusted for: drinking, smoking, sex; BMI; family history, nationality, ACPA, RF.

^dModel 3 adjusted for: drinking, smoking, sex; BMI; family history, nationality, ACPA, RF, white meat and sea food, sodium, milk, yoghurt, soybean milk.