Figure 1.

Flowchart of the study.

^aPatients were gathered from our research database and supplemented by a search in the patient records with ICD-7-10 diagnosis codes K90.0, 579A, 579.0, 269.00, 269.98 and 286.00 possibly indicating coeliac disease.

^bPatients with an incorrect diagnosis code were found to have, for example, haemophilia A, cow’s milk allergy, primary lactose intolerance or von Willerbrandt disease.