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TABLE 3: Accuracy of initial interpretations of 1324 emergency cranial CT scans by residents
Diagnosis Findings
True-Positive False-Positive False-Negative True-Negative
Acute cerebral ischemia 7 2 1 1314
Hemorrhage 27 10 2 1285
Note.—For acute cerebral ischemia, specificity and sensitivity were 87.5% and 99.8%, respectively; for hemorrhage, 93.1% and 99.2%, respectively.
Diagnosis	Findings
Diagnosis	True-Positive	False-Positive	False-Negative	True-Negative
Acute cerebral ischemia	7	2	1	1314
Hemorrhage	27	10	2	1285