Is the severity of adolescent conduct disorder associated with the level of nicotine dependence?

Our aim was to investigate the relationship between the number of Conduct Disorder (CD) symptoms and specific DSM-IV symptom subscales (i.e., aggression towards people and animals, destruction of property, deceitfulness or theft, and serious violations of rules) and nicotine dependence (ND) among adolescent psychiatric inpatients in Finland. A total of 171 adolescents with CD (99 boys and 72 girls; age 12-17 years) were admitted to inpatient psychiatric hospitalization between April 2001 and March 2006. Information on their psychiatric DSM-IV diagnoses was obtained using the Schedule for Affective Disorder and Schizophrenia for School-Age Children (K-SADS-PL). The level of ND was assessed with the modified Fagerström Tolerance Questionnaire (mFTQ). The total number of CD symptoms correlated with the level of ND among both the boys (adj. r = 0.31, p = 0.002) and the girls (adj. r = 0.324, p = 0.006). For the boys, the number of conduct symptoms correlated with the level of ND on all subscales except for aggression, while the only statistically significant correlation for the girls was found with the deceitfulness or theft subscale. A comorbid substance use disorder was statistically significant and associated with a high level of ND among the boys (p < 0.001) and the girls (p = 0.019). Our results suggest that both in adolescent boys and girls, the greater the number of CD symptoms, the higher the level of ND. Future studies are needed on the relationship between environmental factors, non-aggressive CD symptoms and the development of ND among adolescents with CD.