“…Data from the majority of these studies lend consistent support for a strong relationship between nicotine dependence and depression (6,27,29,(34)(35)(36)48,(55)(56)(57). Overall, the findings suggest that adolescents and adults with past-year MDD, dysthymia, or depressive symptoms reported higher rates of current (6,27,(34)(35)(36)48,55,57) and lifetime (27) nicotine dependence than those without MDD, dysthymia, or depressive symptoms. In contrast, one study found no significant differences in the rate of lifetime nicotine dependence between those with and without an active diagnosis of dysthymia; however, significant associations between active MDD, preexisting MDD, and preexisting dysthymia and lifetime nicotine dependence emerged (29).…”