Finally, post-hoc analyses were conducted to probe the significant direct and interaction effects on INT and EXT dimensions for each of the four levels of 9/11 exposure. In these analyses, dummy codes for each level of exposure (reference group (0): No exposure; (1): Indirect exposure through media, news, etc.; (2): Had a close friend or family member injured or killed; and (3): Direct exposure) were first included in place of the categorical exposure variable in the main effects model. Subsequently, interaction terms between each dummy code and each childhood adversity variable were included.
