Figure 1.

Overview of patients’ assignment to the study and control groups, as well as the extraction of characteristics related to FD from text records and descriptions of ICD-10 codes. The fields that were used for FD risk factor assessment are indicated in lime. Fields eliminating patients from further analysis due to specific symptoms or exclusion criteria, which are described in the Materials and Methods, are indicated in gray. EHR—electronic health records; ICD-10—International Statistical Classification of Diseases and Related Health Problems; NLP—natural language processing.