Background
pneumonia, autoimmune diseases, CAP, organ failure, Machine learning, tissue damage
CONNECTIVE TISSUE DISEASE, AUTOIMMUNE DISEASES, COMMUNITY-ACQUIRED PNEUMONIA, PNEUMONIA
Connective tissue disease (CTD) is a series of autoimmune diseases that often leads to collagen deposition, tissue damage, and eventual target organ failure (The severity assessment of patients with pneumonia is one of the most important predictors of patient prognosis. Several scoring methods exist for the assessment of the severity of community-acquired pneumonia (CAP) (Machine learning is a branch of artificial intelligence that uses algorithms to identify relationships in data (We constructed a comprehensive predictive nomogram by using machine learning algorithms, clinical features, and laboratory test indicators. In addition, we validated the prognostic performance of the model using an internal validation cohort.