目的探讨急性深静脉血栓形成(deep venous thrombosis of the lower limbs,DVT)发病时间是否存在季节性。方法收集2008年12月至2012年5年间的774例DVT患者的临床资料,通过圆形分布法分析。结果DVT的总体发病时间有季节规律性(P〈0...目的探讨急性深静脉血栓形成(deep venous thrombosis of the lower limbs,DVT)发病时间是否存在季节性。方法收集2008年12月至2012年5年间的774例DVT患者的临床资料,通过圆形分布法分析。结果DVT的总体发病时间有季节规律性(P〈0.01),冬季发病多、夏季发病少,高峰日在1月1日。女性亚组的发病有季节差异(P〈0.01),男性亚组的发病无季节性差异(P〉0.05)。发病数在冬季上升夏季下降。不同的年龄亚组(〈40岁,40一69岁,〉69岁)的发病时间都拥有季节规律性(P〈0.05,P〈0.01,P〈0.01),发病高峰月为12月份,发病低谷月为8月份。左下肢及双下肢亚组的季节规律性差异有统计学意义(P〈0.01,P〈0.01),发病高峰集中在12月份和1月份。制动亚组有显著的季节规律性(P〈0.001),冬季发病数明显高于夏秋季发病数,1月1日是其发病高峰日。其他诱因亚组则差异无统计学意义。结论DVT存在冬季发病率上升,夏季发病率下降的季节规律性,女性组、高龄组(I〉70岁)、制动组的季节规律性最为显著。展开更多
In seasonal frozen soil region,the engineering geological properties of loess-like soil will be deteriorated after freeze-thaw cycles.Through the freeze-thaw cycle experiment of remolded loess-like soil,under differen...In seasonal frozen soil region,the engineering geological properties of loess-like soil will be deteriorated after freeze-thaw cycles.Through the freeze-thaw cycle experiment of remolded loess-like soil,under different freezing temperatures,the authors carried out freeze-thaw cycle tests for 3 times and 20 times,respectively.With mercury intrusion porosimetry and granulometric analysis,from the micro-structure,the authors studied the law that freeze-thaw cycle times and frozen temperature effect on the variation of microscopic pore of loesslike soil.This result can provide theoretical basis for comprehensive treatment of problems in the construction of the project in seasonal frozen loess-like soil region.展开更多
文摘目的探讨急性深静脉血栓形成(deep venous thrombosis of the lower limbs,DVT)发病时间是否存在季节性。方法收集2008年12月至2012年5年间的774例DVT患者的临床资料,通过圆形分布法分析。结果DVT的总体发病时间有季节规律性(P〈0.01),冬季发病多、夏季发病少,高峰日在1月1日。女性亚组的发病有季节差异(P〈0.01),男性亚组的发病无季节性差异(P〉0.05)。发病数在冬季上升夏季下降。不同的年龄亚组(〈40岁,40一69岁,〉69岁)的发病时间都拥有季节规律性(P〈0.05,P〈0.01,P〈0.01),发病高峰月为12月份,发病低谷月为8月份。左下肢及双下肢亚组的季节规律性差异有统计学意义(P〈0.01,P〈0.01),发病高峰集中在12月份和1月份。制动亚组有显著的季节规律性(P〈0.001),冬季发病数明显高于夏秋季发病数,1月1日是其发病高峰日。其他诱因亚组则差异无统计学意义。结论DVT存在冬季发病率上升,夏季发病率下降的季节规律性,女性组、高龄组(I〉70岁)、制动组的季节规律性最为显著。
文摘In seasonal frozen soil region,the engineering geological properties of loess-like soil will be deteriorated after freeze-thaw cycles.Through the freeze-thaw cycle experiment of remolded loess-like soil,under different freezing temperatures,the authors carried out freeze-thaw cycle tests for 3 times and 20 times,respectively.With mercury intrusion porosimetry and granulometric analysis,from the micro-structure,the authors studied the law that freeze-thaw cycle times and frozen temperature effect on the variation of microscopic pore of loesslike soil.This result can provide theoretical basis for comprehensive treatment of problems in the construction of the project in seasonal frozen loess-like soil region.