Table 3.

Odds ratios for rheumatoid arthritis (RA) by categories of the Mediterranean diet score among participant in the EIRA study who were current smokers and carrying at least one HLA-DRB1 shared epitope allele (n = 266 patients with RA (cases) and n = 121 controls)

	Mediterranean diet score
	0–2	3	4–5	6–9
Overall
Number	83/23	61/29	79/48	43/21
OR crude	Ref	0.61 (0.31–1.18)	0.45 (0.25–0.83)	0.57 (0.27–1.18)
OR adjusted	Ref	0.61 (0.31–1.22)	0.53 (0.28–1.02)	0.63 (0.28–1.37)

Odds ratio (OR) crude was conditioned on age, gender and residential area. OR adjusted was adjusted for smoking, physical activity, education level, body mass index, energy intake and use of supplements

Ref reference