Fig. 1. Results of the random forest regression analysis for measures of volume and number of fiber streams in each segment of the corpus callosum in males and females.

The graph indicates at each age the variable importance of exposure to the type of maltreatment having maximal importance at that age. Arrows are drawn next to ages in which a particular type of maltreatment (labeled) at that specific age emerged as a statistically significant predictor variable (or risk factors). The arrows indicate the directionality of the association, that is whether increasing exposure to that type of maltreatment at that age was associated with increasing or decreasing CC measures based on the saved random forest. Abbreviations. EN emotional neglect, NVEA non-verbal emotional abuse, Peer_E peer emotional bullying, Peer_P peer physical bullying, Phys physical abuse, PN physical neglect, PVA parental verbal abuse, SexA sexual abuse, WIPV witnessing interparental violence, WSIB witnessing violence to siblings.