Effect of function of mobile phone use on the self-perceived stress and mobile phone addiction of high vocational students / 中国学校卫生

Objective@#To explore the impact of function of mobile phone use on self-perceived stress and mobile phone addiction of high vocational students, and the mediating role of coping styles between different mobile phone functions and mobile phone addiction.@*Methods@#A total of 911 participants in two vocational colleges in Wuhan and Liaocheng were investigated by using convenient sampling method. Smartphone Usage, Simplified Coping Style Questionnaire, and Stress subscale of Depression-Anxiety-Stress Scale(short version) were administered to participants.@*Results@#Female students scored significantly higher on mobile phone social features (4.77±1.06) than males( t =2.05， P =0.04), while males scored significantly higher on MPATS and DASS-S, Negative Coping Style subscales than females( P <0.01). The social function of the mobile phone was positively related to the positive coping styles( r =0.17, P <0.01). The game features of mobile phone were positively related to negative coping styles, stress and mobile addiction( P <0.01). Negative coping style could positively predict stress and mobile phone addiction( β =0.53, 0.50, P <0.01). Negative coping styles and stress had significant chain mediation effects in nonsocial functions and mobile phone addiction(95% CI =0.06-0.24, P <0.01).@*Conclusion@#Students of vocational college who often use cellphone not for social purpose have higher self-perceived stress. The game function of mobile phones had an adverse effect on the physical and mental health of vocational students. Negative coping style is a powerful predictor of stress and mobile phone addiction.

An classification of posterior malleolar fractures by computed tomography and its guide to clinical treatment / 中国矫形外科杂志

[Objective]To classify fractures of posterior malleolus by computed tomography and guide its clinical treatment.[Method]From January 2003 to October 2006,eighty-eight patients who had been treated surgically for the posterior malleolar fractures were reviewed.There were 53 males and 35 females.The mean age was 42.3 years(ranged,18～75 years).All the patients' preoperative radiograph and computed tomographic scans were reviewed,and each fracture was categorized according to the size,location and fracture line of the major fragment and the stable state of mortise.The classification was applied to treat 88 patients.[Result]On the basis of the computed tomographic images,the posterior malleolar fractures were categorized into four types.There were type Ⅰ(stable) in 23 cases,type Ⅱ(borderline) in 26 cases,type Ⅲ(big unstable posterolateral oblique) in 18 cases and type Ⅳ(medial-extension) in 21 cases.Type Ⅰ included type Ⅰ1(small shell)in 5 cases and type I2(small posterolateral oblique) in 18 cases.Type Ⅱ included type Ⅱ1(moderate posterolateral oblique without lateral-posterior dislocation of talus)in 15 cases and type Ⅱ2(moedrate postero-lateral oblique with lateral-posterior dislocation of talus)in 11 cases.All patients were followed up for an average of 31months(ranged from 12 to 48 months).According to the Baird-Jackson scoring system,the results were rated as being excellent in 62 cases,good in 13 cases,moderate in 8 cases,and poor in 5 cases,with the good-excellent rate being 85.2%.[Conclusion]Computed tomographic scans can demonstrate the pathoanatomy of the posterior malleolar fracture and provided guidance for clinical treatment.