Parents of 139 children agreed to take part, 29 with severe (59%), 19 with moderate (33%) and 90 with mild TBI (22%). In the mild group, 49 of the 90 volunteers were recruited to match the moderate and severe groups in terms of age, sex, and time since injury. One child in the severe group was unable to complete a self-esteem assessment, giving
a total of 96 study participants: 28 (29%) severe, 19 (20%) moderate, and 49 (51%) mild.