Objective To study the relationship between sensation seeking,personality characteristics and health-risk behaviors of medical freshmen.Methods Sensation Seeking Scale ( SSS),Eysenck Personality Questionnaire( EPQ),Adolescent Health-Risk Behaviors Questionnaire were applied in this survey to 384 freshmen from two medical colleges.Results ① The health risk behaviors were comnmon in the medical college freshmen (5.2％,48.2％ ),and the score of health risk behaviors had a significant difference between boys and girls,boys risk behaviors were much more than girls(P＜ 0.05 ).②The correlations between the risk behaviors (such as smoking,drinking,fighting,suicidal ideas,using internet too long,poor eating behavior,lack of physical exercise) and sensation seeking personality traits were strong.The health-risk behaviors were all correlated with extraversion(E)and neuroticism (N) significantly( 66.78 ± 10.29 vs 60.57 ± 9.09,t =2.54,P ＜ 0.01 ;7.11 ± 3.23 vs 5.33 ±2.89,t =2.81,P ＜ 0.05 ).③The results of logistic regression analysis showed that male mother' s high education level,sensation seeking,Eysenck' s P,N dimension were effective prediction factors of freshmen ' s health-risk behaviors.Conclusion Medical college freshmen who have higher levels of sensation seeking,Eysenck' s P,N dimension are more prone to health risk behaviors.

Treatment resistant depression is a common and severe mental disorder associated with significant burden of disease .Most individuals receiving conventional pharmacotheraphy fail to achieve and sustain remission.So this is still one of the difficult challenges for the psychiatrist .Much of the research pro-vided indications that the efficacy of treatment for the disease was not optimistic, but the treatment was still made great progress .The common treatments for this disease included pharmacotherapy,psychotherapy,elec-troconvulsive therapy(ECT),transcranial magnetic stimulation (TMS),magnetic resonance guided focused ultrasound surgery( MRgFUS) ,deep brain stimulation ( DBS) ,aerobic exercise,light therapy and so on.Each therapeutic strategy has its own features, and could be suitable or unsuitable in some situations.The high rates of non-remission with first-line treatment strategies make the combination of antidepressant and non-drug treatments to be the new trend of the treatments for treatment resistant depression in the future.