Table 1.

Sources and content of feature extraction.

Type	Sources	Content
Structured Data	Medical Records Homepage	Gender, Age, etc.
	Laboratory Items	All abnormal test data prior to the diagnosis of colorectal adenoma, including but not limited to Glycated Hemoglobin, Total Cholesterol, Fecal Occult Blood Test, Complete Blood Count, Biochemical Profile, Tumor Markers, etc.
Unstructured Data	Chief Complaint/History of Present Illness (HPI)	Hematochezia, Abnormal Stool, Colonic Polyps, Abdominal Pain, Acid Reflux, Diarrhea, etc.
	Family History	Colorectal Cancer, etc.
	Physical Examination	Digital Rectal Exam, BMI, Systolic Blood Pressure, etc.
	Past Medical History	Hypertension, Hyperlipidemia, Diabetes, Metabolic Syndrome, History of H. pylori Infection, etc.
	Examination Items	Abdominal Ultrasound, Abdominal CT, etc.