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Smoking Can Increase Depressive Symptoms in Teens While some teenagers may puff on cigarettes to self-medicate against the blues，scientists at the University of Toronto1 and the University of Montreal2 have found that smoking may actually 1 depressive symptoms in some teens. benefits of smoking among teens, says lead researcher Michael Chaiton，a research associate3 at the Ontario Tobacco Research Unit of the University of Toronto.3 cigarettes may appear to have self-medicating 4 or to improve mood，in the long term4 we found that teens who started to smoke reported5 higher depressive symptoms. Participants were divided into three 7: never smokers;smokers who did not use cigarettes to self-medicate，improve mood or physical 8smokers who used cigarettes to self-medicate.Depressive symptoms were measured using a scale that asked how felt too fired to do things：had 9 going to sleep or staying 10felt unhappy，sad，or depressed;felt hopeless about the future;felt vexed，antsy or tense;and worried too much about things. The 13 between depression and smoking exists 14 一among teens that use 词汇： self-medicate v.自我治疗 antsy adj.坐立不安的，烦躁的 注释： 2.the University of Montreal：蒙特利尔大学 4.in the long term：从长远看 | 
