| CeD | Celiac disease |
| ND-CeD | Newly diagnosed patients with celiac disease |
| GFD-CeD | Patients with CeD on a gluten-free diet |
| BFS | Brain Fog Scale |
| BFSS | Brain Fog Severity Score |
| MoCA | Montreal Cognitive Assessment |
| SQS | Single-Item Sleep Quality Scale |
| WHOQOL-BREF-TR | World Health Organization Quality of Life Questionnaire-Brief Form-TR |
| GBA | Gut–brain axis |
| GI | Gastrointestinal |