F2 and Sepsis: It was not inferior to other laboratory values, including activated partial thromboplastin time (AUC: 0.729), C‐reactive protein (AUC: 0.727), albumin (AUC: 0.834), prothrombin time (AUC: 0.816), and creatinine (AUC: 0.837) known to be associated with sepsis.