A traumatic brain injury may result from a violent blow to the
head or when an object pierces the skull and enters the brain tissue.
Has a doctor or other health professional ever told you that you
have suffered a traumatic brain injury (TBI)?

Response Unweighted Frequency Weighted Percentage Standard Error 95% Confidence Limit
Lower Upper
Yes 23 3.2 0.8 1.7 4.7
No 680 96.8 0.8 95.3 98.3

Among respondents who ever served on active duty in the United States Armed Forces,
either in the regular militaryor in a National Guard or military reserve unit,
excluding unknowns and refusals.
On Questionnaire Split B