Table 2.

Analysis of false-positive predictions based on TF-IDF

Code	Evidence from note	T/F	Potential cause
I25	“ … all negative for stress induced ischemia …”	F	negation
I48	“ … has the following active medical issues hx of afib …”	T
I48	“ … paroxysmal atrial fibrillation is seen here …”	T
I48	“ … was found to be in atrial fibrillation …”	T
I48	“ … cardiac history of atrial flutter and atrial fibrillation …”	F	personal medical history
I48	“ … for post hospital check after admission for atrial fibrillation …”	F	personal medical history

The note predictions were manually extracted, analyzed, and labeled as true (T) or false (F) based on evidence in the notes, and the potential causes of erroneous predictions were analyzed.