Table 3 Odds ratios for the risk of developing rheumatoid arthritis by categories of tea consumption, stratified by type of tea among 2237 cases and 4661 controls, included in the EIRA study 2005–2018

Herbal tea (cups/day)

 No consumers (0)

1923/3959

0.94 (0.77–1.15)

0.86 (0.70–1.05)

 Irregular consumers (< 1)

167/332

Ref

Ref

 Regular consumers (≥1)

147/370

0.78 (0.59–1.03)

0.77 (0.58–1.02)

Tea (cups/day)

 No consumers (0)

1048/2150

0.89 (0.78–1.03)

0.83 (0.71–0.96)

 Irregular consumers (< 1)

432/815

Ref

Ref

 Regular consumers (1–< 2)

397/848

0.86 (0.72–1.02)

0.90 (0.76–1.08)

 High consumers (≥2)

360/848

0.78 (0.66–0.94)

0.85 (0.71–1.03)