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Objective To study the influence of psychological factors on the loss of methadone maintenance treatment and its countermeasures, and to provide a basis for formulating corresponding intervention countermeasures. Methods From April 2012 to July 2013.a prospective cohort study was conducted to conduct a follow-up survey of patients in 6 methadone maintenance treatment clinics in Guangzhou. The basic information. psychological factors and other information of the treated person were collected. The national unified methadone maintenance treatment information collection system was used to collect daily medication records of patients. The Cox proportional hazards regression model was used to analyze the influencing factors of the loss of methadone maintenance treatment patients. Results Among the 548 subjects. 485(89. 2%) were male, and their age was (41.9±6. 5) years old. The one-year loss rate was 54. 7% (300/548). Multivariate Cox regression analysis found that among the psychological factors self efficacy (HR=0.97, P=0.005) was the main cause of loss. Conclusion The lower the self-efficacy, the easier it is to lose. In or der to reduce the loss rate.in addition to providing methadone, methadone clinics should also carry out appropriate psychological intervention services to improve patients' confidence in persisting in taking medication. [ABSTRACT FROM AUTHOR]

目的：探究并描述环卫工人所从事职业环境与其胸部X线片影像学表现的关系。方法选择2012~2014年在成都市第六人民医院体检的2534例患者胸部X线片临床资料，根据3年内是否暴露在城市街道的工作环境中将其分为暴露组1156例，非暴露组1378例。采用历史性队列研究方法分析暴露组与非暴露组人员的胸部X线片影像学表现差异。结果暴露组与非暴露组在肺纹理增多、肺纤维灶胸膜增厚、肺气肿、肺部占位等影像学改变有明显差异，且相对危险度关联强度为6.66。结论从事粉尘清扫工作的环卫工人或长期暴露于有害环境的人员与胸部的影像学表现有一定相关性，各级政府卫生行政部门应加强环卫工人职业危害的宣传教育，提高对职业病危害的认识，并制定相关管理规定，做好环卫工人的职业防护工作。 [ABSTRACT FROM AUTHOR]