Table 2.

Traumatic Brain Injury Assessment (Williams et al., 2010).

Classification	N = 56 (%)
0 = No history	15 (26.8)
1 = Feeling dazed and confused but no LOC, minor concussion	1 (1.8)
2 = LOC < 10 min, mild TBI	24 (42.9)
2a = LOC but no concussion symptoms	14 (25.0)
3 = LOC 10 to 30 min, complicated mild TBI	1 (1.8)
4 = LOC 30 to 60 min, moderate/severe TBI	1 (1.8)
5 = LOC > 60 min, very severe TBI	0

LOC = Loss of consciousness. TBI was assessed over the participant’s lifetime rather than restricted to just their armed forces career.