Explore the characteristics of TCM syndrome elements and distribution patterns of syndrome types in comorbid populations; Screen for "high-risk syndrome patterns" and frequently co-occurring complex syndromes; Identify characteristic syndrome patterns at key stages: acute phase, recovery phase, and upon occurrence of endpoint events; Investigate the temporal evolution of TCM syndrome patterns and the disease-syndrome correlation patterns in comorbid patients.
Aged ≥ 18 years Diagnosed with comorbidities relevant to "toxin-damaged collaterals" theory (e.g., type 2 diabetes mellitus with cardiovascular/cerebrovascular disease).
Acute infectious diseases, malignant tumors, or autoimmune disorders. Mental illness or cognitive impairment affecting symptom assessment.