In a large prospective cohort of older women, there was no association between coffee consumption and incident rheumatoid arthritis (RA), according to a recent study. However, a small association between daily caffeinated, nonherbal tea consumption and incident RA was found. 76,853 women from The Women's Health Initiative Observational Study—a longitudinal, prospective, cohort study conducted from 1993 to 1998—completed a self-administered questionnaire about their daily consumption of tea and coffee. 185 women who self-reported and validated incident cases of RA were observed after 3 years of observation. Researchers found:
- There was no increase in the hazard ratio for incident RA in those participants who drank coffee compared with those who did not.
- The amount of coffee consumed and the method of preparation (caffeinated/decaffeinated; filtered/unfiltered) also did not alter the risk of incident RA.
- There was a positive association of incident RA and caffeinated tea consumption in the trend test.
- When assessing any caffeinated tea consumption vs no tea consumption, the hazard ratio for incident RA was 1.40 (confidence interval, 1.01–1.93).
Lamichhane D, Collins C, Constantinescu F, et al. Coffee and tea consumption in relation to risk of rheumatoid arthritis in the Women's Health Initiative Observational cohort. [Published online ahead of print April 19, 2018]. J Clin Rheumatol. doi:10.1097/RHU.0000000000000788.