Figure 1. Frequency of Bleeding-Related Terms Automatically Identified by pyConText in 120 Clinical Notes.

Terms that are frequently used by clinicians to describe bleeding in clinical notes were identified during the knowledge generation phase and then used as target terms in the natural language processing algorithm. BRBPR indicates bright red blood per rectum; GIB, gastrointestinal bleeding; ICH, intracerebral hemorrhage; SAH, subarachnoid hemorrhage; and SDH, subdural hematoma.