Table 4

Relative risk of RA in women, with or without a history of breast cancer, by antihormonal treatment before RA diagnosis, adjusted for age, education, age at first birth, number of children and family history of breast cancer/ovarian cancer

RA (N)Controls (N)Fully adjusted OR (95% CI)
No breast cancer15 36676 2481.07 (0.88 to 1.31)
Never AI or tamoxifen117631REF
Only tamoxifen versus never623830.86 (0.62 to 1.20)
Only AI versus never593220.97 (0.69 to 1.37)
Both AI and tamoxifen versus never211630.68 (0.41 to 1.12)
  • AIs, aromatase inhibitors; RA, rheumatoid arthritis.