PERINATAL RISK FACTORS FOR INFLAMMATORY BOWEL DISEASE: A CASE-CONTROL STUDY

To examine perinatal risk factors for Crohn's disease and ulcerative colitis, the authors analyzed birth records for 257 known case participants delivered from 1924 through 1957 at the University Hospital in Uppsala County, Sweden, and compared them with records for 514 controls delivered at the hospital. The two groups were matched by date of birth, sex, and either maternal age or parity. Eleven study variables were abstracted from standard...