Table 2 also provides ORs and confidence intervals for the lifetime prevalence of any assessed disruptive behavior disorder. In contrast to the results for substance use, but consistent with other published reports6, 25, adoption status was associated with an increased prevalence of any disruptive behavior disorder. Importantly, this increased risk for adoptees was not associated with exposure to parent smoking. However, non-adopted adolescents exposed to parent smoking were significantly more likely than those not exposed to be diagnosed with any disruptive behavior disorder (OR=2.34). The interaction between adoption status and exposure was significant, indicating, as before, a larger exposure effect in biologically related families.
