MAOA and brain injury: Exploratory post hoc t-tests revealed no significant differences between the “Absent Biomechanism” group and the “Brain Injury” group [t(212.85) = 2.42, p = 0.043], nor between the “Brain Injury” group and the “MAOA gene” group [t(204.94) = 1.17, p = 0.475], or the “MAOA gene” group and the “Absent Biomechanism” group [t(202.35) = 1.17, p = 0.470] (Figure 3).