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背景长时间看电视是工业化国家最常见也是最普遍的坐式行为,其与患病率和死亡率相关。然而,已发表的研究尚无可用的系统性定量评估。目的对所有前瞻性定群研究完成荟萃分析,以调查看电视与2型糖尿病、致命性或非致命性心血管病及全因死亡率风险的相关性。数据源及研究选择经对1970年至2011年3月联机医学文献分析与检索系统数据库,及1974年至2011年3月医学文摘资料库相关研究不限定检索、复习检索文献所列出参考文献,对相关研究进行识别。定群研究报告了与之相关风险可信限为95%CI。数据提取每位作者独立提取相关数据,用随机作用模式获得相关简要评估。数据综合所含8项研究,有4项报告了2型糖尿病(110万人年跟踪期间,175 938人,6 428例发病),4项报告了致命性或非致命性心血管病(34 253人,1 052例发病)、3项报告了全因死亡率(202 353人年跟踪期间,26 509人,死亡1 879例)。看电视2 h/d混合相关风险为:2型糖尿病1.20[95%CI(1.14,1.27)];致命性或非致命性心血管病1.15[95%CI(1.06,1.23)];全因死亡1.13[95%CI(1.07,1.18)]。看电视>3 h/d,当看电视时间与2型糖尿病和心血管病风险相关呈直线关系时,全因死亡风险呈现上升。评价看电视2 h/d绝对风险差:2型糖尿病176例/100 000人/年;致命性心血管病38例/100 000人/年;全因死亡104例/100 000人/年。结论长时看电视与2型糖尿病、致命性和非致命性心血管病及全因死亡风险增加相关。
Background Watching television for long periods of time is the commonest and most common sitting behavior in industrialized countries, which is associated with morbidity and mortality. However, there is no systematic quantitative assessment of published studies. Objective To perform a meta-analysis of all prospective cohort studies to investigate the association between television and type 2 diabetes, fatal or non-fatal cardiovascular disease and all-cause mortality risk. Data Sources and Research Options After searching and analyzing the database of on-line medical literature analysis and retrieval system from March 1970 to March 2011 and the related research of medical abstracts database from March 1974 to March 2011, Identify related research. The cohort study reported a 95% confidence limit for the associated risk. Data extraction Each author independently extracted the relevant data, using a randomized mode to obtain relevant brief assessment. Four of the eight studies included in the data series reported type 2 diabetes (175 938 people, 6 428 infections during the 1.1 million person-year follow-up) and 4 reported fatal or non-fatal cardiovascular disease (34 253 1 052 cases) and 3 reported all-cause mortality (202,503 person-years of follow-up, 26,509 deaths, 1 879 cases). The risk associated with TV 2 h / d mixing was 1.20 [95% CI (1.14,1.27)] for type 2 diabetes; 1.15 [95% CI (1.06,1.23)] for all-cause mortality or fatal or non-fatal cardiovascular disease 1.13 [95% CI (1.07, 1.18)]. Watching TV> 3 h / d, the risk of all-cause death increased when TV time was linearly related to the risk of type 2 diabetes and cardiovascular disease. Evaluation of TV 2 h / d absolute risk difference: type 2 diabetes 176/100 000 person / year; fatal cardiovascular disease 38/100 000 person / year; all-cause death 104/100 000 person / year. Conclusion Long-term watching television is associated with increased risk of type 2 diabetes, fatal and non-fatal cardiovascular disease and all-cause mortality.