Table 3 Description of the outcome IBD and its subtypes Crohn’s disease and ulcerative colitis according to Liu et al. [17] used in validation analyses
From: Asthma and the risk of gastrointestinal disorders: a Mendelian randomization study
|  | IBD | Crohn’s disease | Ulcerative colitis |
|---|---|---|---|
Sample size | 86,640 | 62,192 | 64,826 |
Cases, abs (rel) | 38,155 (0.44) | 20,550 (0.33) | 17,647 (0.27) |