Fig. 2.

Sample selection of patients with IBD with and without TE. IBD inflammatory bowel disease, TE thromboembolic event. ^aPatients were not allowed to have a diagnosis of any of the following IMDs prior to their first IBD diagnosis: ankylosing spondylitis, atopic dermatitis, multiple sclerosis, plaque psoriasis, psoriatic arthritis, rheumatoid arthritis and systemic lupus erythematosus. ^bQualifying diagnoses for autoimmune disorders were identified on the inpatient and/or outpatient services claims datasets. All patients were required to have eligibility data. ^cTEs included deep vein thrombosis, pulmonary embolism, ischemic stroke and myocardial infarction. ^dMatching between the TE cohort and no TE cohort was done with a 1:13 ratio to keep as many eligible patients with TEs as possible. ^eFor TE patients with > 1 eligible matched no TE patient, 1 no TE patient was randomly selected