| IBD | Inflammatory Bowel Disease |
| CD | Crohn’s disease |
| UC | Ulcerative colitis |
| HCs | Healthy controls |
| PCDAI | paediatric Crohn’s disease activity index |
| PUCAI | Pediatric Ulcerative Colitis Activity Index |
| MD | Mediterranean Diet |
| RDA | Recommended Daily Allowances |
| ESPGHAN | European Society for Paediatric Gastroenterology, Hepatology and Nutrition |