| 5-ASA | 5-Aminosalicylic acid |
| aOR | Adjusted odds ratio |
| AUC | Area under the receiver operating characteristic curve |
| BMI | Body mass index |
| CD | Crohn’s disease |
| CI | Confidence interval |
| CRP | C-reactive protein |
| df | Degrees of freedom |
| ENEIDA | Nationwide Study on Genetic and Environmental Determinants of Inflammatory Bowel Disease |
| GI | Gastrointestinal |
| GIVES-21 | Global IBD Visualization of Epidemiology Studies in the 21st Century |
| HBI | Harvey–Bradshaw Index |
| IBD | Inflammatory bowel disease |
| ICH-GCP | International Council for Harmonisation–Good Clinical Practice |
| IQR | Interquartile range |
| LEC | Local Ethics Committee |
| OR | Odds ratio |
| SWIBREG | Swedish Inflammatory Bowel Disease Register |