Is tea consumption associated with reduction of risk of rheumatoid arthritis? A Swedish case-control study.

ABSTRACT:

Background

Tea is a popular beverage around the world and has properties that can affect the immune system. The association between tea consumption and the risk of rheumatoid arthritis (RA), a chronic autoimmune disease primarily affecting the joints, is not well studied and results are conflicting.

Methods

We collected data on tea consumption for 2237 incident RA cases diagnosed 2005-2018 and 4661 controls matched on age, sex, and residential area. Tea consumption was classified into no (0 cups/day), irregular (< 1 cup/day), regular (1-2 cups/day), and high (≥ 2 cups/day) consumption, and irregular consumption was used as the reference category. Missing data on tea consumption was classified as no consumers, and sensitivity analyses were performed to test this assumption. O

SUBMITTER: Westerlind H 

PROVIDER: S-EPMC8349003 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature