Summary: This cohort consists of World War II veterans who were discharged from military hospitals with a diagnosis of head injury. Exposed include 7,459 individuals with a diagnosis code #2543 (intercranial injury; concussion), and 3,129 with a diagnosis code #2595 (blast concussion), for a total of 10,588. The comparison group includes 11,481 individuals with a discharge diagnosis code #0812 (pneumonia), 1,560 with diagnosis code #2562 (incised wound), and 3,471 with a diagnosis code #2565 (puncture wound), for a total of 16,512.

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Keywords: head injury; World War II

Cohort Characteristics: 17,100 total records

Data item	Exposed (10,588)	Comparison (16,512)
Military service number:	100% complete	100% complete
Injury Diagnosis:	100% complete	100% complete
Date of Injury:	100% complete	100% complete