Descriptive statistics and group comparisons of demographic and injury severity characteristics (categorical variables) by group.

Note: N = 62 (Uncomplicated MTBI, n = 31; Complicated MTBI); Abbreviations: CT = computed tomography; GCS = Glasgow Coma Scale; PTA = post-traumatic amnesia; LOC = loss of consciousness; MTBI = mild traumatic brain injury; MVA = motor vehicle accident; BAL = blood alcohol level. Footnotes: 1 Defined based on criteria for heavy drinking established by the National Institute on Alcohol Abuse and Alcoholism: (a) Females: 8 or more drinks per week or 4 or more drinks on a single occasion more than 52 times per year; (b) Males: 15 or more drinks per week or 5 or more drinks on a single occasion more than 52 times per year. Descriptive statistics and group comparisons of demographic and injury severity characteristics (categorical variables) by group.