Supplement 1. Criteria for appropriate thyroid ultrasound characterization

This supplement provides a detailed classification system for identifying clinical information related to thyroid health within patient records. It consists of a comprehensive table that maps various conditions to the specific sections of a clinical note where they are documented.The table is structured into three columns:<b>Condition</b>: Lists clinical concepts such as "Thyroid nodule", "Personal history of Thyroid malignancy", "Family History", and symptoms related to hyper- and hypothyroidism.<b>Clinical Note Section</b>: Specifies where the information is typically found in an electronic health record, for instance, "History of Present Illness" or "Physical Examination".<b>Codes</b>: Provides an extensive list of corresponding keywords, medical terms, and descriptive phrases used to document the specific condition. For example, under "Symptoms of Neck Mass," codes include "neck pressure," "hoarseness," and "dysphagia"