Risks of developing ulcerative colitis and Crohn's disease in relation to silica dust exposure in Sweden: a case-control study.

Objective: To determine whether occupational exposure to silica dust causes an increased risk of developing Crohn's disease (CD) and ulcerative colitis (UC).

Design: Case-control study of CD (K50) and UC (K51) from 2007 through 2016. Controls were matched to cases (2:1) based on age, sex and county at the time of diagnosis.