Self-reported Non-celiac Wheat Sensitivity (NCWS) in Patients Undergoing Digestive Endoscopy

Enrolled patients will fill out a modified version of a previously validated written questionnaire, including two different sections. The first comprises basic demographic information, including age, sex and ethnicity, and a screening section for symptoms consistent with irritable bowel syndrome (IBS) in accordance with the Rome III criteria, also including their past gastrointestinal, allergic and psychiatric history. The second section enquires for self-reported gluten-related symptoms. Participants will be also asked for their use of a gluten-free diet and if they had seen a healthcare professional for their symptoms. A reported diagnosis of celiac disease and wheat allergy in the population group is defined by those who had a doctor diagnosis of celiac disease and wheat allergy and are also taking a gluten-free diet.