The mean sample size did not differ between the two domains of literature (p=0.33; Table 2A). The COA participants were older than those in PAE studies (p=0.02) and were more likely to be male (60% vs 46%, p=0.04). Subsequent analyses comparing age and percent male separately for each disorder revealed that for ADHD, COA individuals were older than PAE individuals (p=0.02; Table 2B) and higher percent male (p=0.04); there were no differences in age or percent male between PAE and COA studies for CD (all p>0.31) or ODD (all p>0.56). There was no association between the LOR and gender, race or age in PAE studies (all p>0.49) or in COA studies (all p>0.26).
