目的分析院前转运方式对急性缺血性卒中患者入院后静脉溶栓时间效率指标及早期神经功能改善的影响。方法回顾性连续纳入2018年6月至2021年5月北京丰台医院神经内科急性缺血性卒中接受静脉溶栓治疗患者302例,均经头部CT或MR证实有新发梗...目的分析院前转运方式对急性缺血性卒中患者入院后静脉溶栓时间效率指标及早期神经功能改善的影响。方法回顾性连续纳入2018年6月至2021年5月北京丰台医院神经内科急性缺血性卒中接受静脉溶栓治疗患者302例,均经头部CT或MR证实有新发梗死灶,并在院内接受静脉溶栓治疗,排除了静脉溶栓桥接取栓治疗患者。根据登记的院前转运方式,将通过“120”或“999”等急救系统到院的患者分为急救转运组,自驾或出租车等其他非急救系统到院方式者分为自行就诊组;根据早期神经功能是否改善,将患者分为早期神经功能改善组和未改善组。分别记录并比较两组患者的人口学资料(年龄、性别等)、动脉粥样硬化的危险因素(高血压病、糖尿病、高脂血症、冠心病、心房颤动及卒中史)及临床资料[就诊时指尖血糖、血压、美国国立卫生研究院卒中量表(NIHSS)评分,发病前改良Rankin量表(mRS)评分,溶栓后24 h NIHSS评分等]。早期神经功能改善定义为静脉溶栓后24 h NIHSS评分较基线减少≥4分或溶栓后24 h NIHSS评分为0分。以早期神经功能改善为因变量,将单因素分析中P<0.1的参数纳入多因素Logistic回归分析,以观察院前转运方式对早期(溶栓后24 h)神经功能改善的影响。结果(1)302例接受静脉溶栓治疗的急性缺血性卒中患者中,急救转运组123例(40.7%),自行就诊组179例(59.3%)。急救转运组患者年龄、就诊时血糖均大于自行就诊组,男性及合并高血压病、冠心病和心房颤动比例均高于自行就诊组,组间差异均有统计学意义[(70±13)岁比(64±12)岁,t=-3.916;8(6,10)mmol/L比7(6,9)mmol/L,Z=-2.578;74.8%(92/123)比61.5%(110/179),χ^(2)=5.861;66.7%(82/123)比53.6%(96/179),χ^(2)=5.119;26.8%(33/123)比15.6%(28/179),χ^(2)=5.660;18.7%(23/123)比3.9%(7/179),χ^(2)=17.812;均P<0.05],糖尿病、高脂血症、卒中史、血压、发病前mRS评分的组间差异均无统计�展开更多
This study explored spatial explicit multiple cropping efficiency （MCE） of China in 2005 by coupling time series remote sensing data with an econometric model - stochastic frontier analysis （SFA）. We firstly extra...This study explored spatial explicit multiple cropping efficiency （MCE） of China in 2005 by coupling time series remote sensing data with an econometric model - stochastic frontier analysis （SFA）. We firstly extracted multiple cropping index （MCI） on the basis of the close relationship between crop phenologies and moderate-resolution imaging spectroradiometer （MODIS） enhanced vegetation index （EVI） value. Then, SFA model was employed to calculate MCE, by considering several indicators of meteorological conditions as inputs of multiple cropping systems and the extracted MCI was the output. The result showed that 46% of the cultivated land in China in 2005 was multiple cropped, including 39% double- cropped land and 7% triple-cropped land. Most of the multiple cropped land was distributed in the south of Great Wall. The total efficiency of multiple cropping in China was 87.61% in 2005. Southwestern China, Ganxin Region, the middle and lower reaches of Yangtze River and Huanghuaihai Plain were the four agricultural zones with the largest rooms for increasing MCI and improving MCE. Fragmental terrain, soil salinization, deficiency of water resources, and loss of labor force were the obstacles for MCE promotion in different zones. The method proposed in this paper is theoretically reliable for MCE extraction, whereas further studies are need to be done to investigate the most proper indicators of meteorological conditions as the inputs of multiple cropping systems.展开更多
文摘目的分析院前转运方式对急性缺血性卒中患者入院后静脉溶栓时间效率指标及早期神经功能改善的影响。方法回顾性连续纳入2018年6月至2021年5月北京丰台医院神经内科急性缺血性卒中接受静脉溶栓治疗患者302例,均经头部CT或MR证实有新发梗死灶,并在院内接受静脉溶栓治疗,排除了静脉溶栓桥接取栓治疗患者。根据登记的院前转运方式,将通过“120”或“999”等急救系统到院的患者分为急救转运组,自驾或出租车等其他非急救系统到院方式者分为自行就诊组;根据早期神经功能是否改善,将患者分为早期神经功能改善组和未改善组。分别记录并比较两组患者的人口学资料(年龄、性别等)、动脉粥样硬化的危险因素(高血压病、糖尿病、高脂血症、冠心病、心房颤动及卒中史)及临床资料[就诊时指尖血糖、血压、美国国立卫生研究院卒中量表(NIHSS)评分,发病前改良Rankin量表(mRS)评分,溶栓后24 h NIHSS评分等]。早期神经功能改善定义为静脉溶栓后24 h NIHSS评分较基线减少≥4分或溶栓后24 h NIHSS评分为0分。以早期神经功能改善为因变量,将单因素分析中P<0.1的参数纳入多因素Logistic回归分析,以观察院前转运方式对早期(溶栓后24 h)神经功能改善的影响。结果(1)302例接受静脉溶栓治疗的急性缺血性卒中患者中,急救转运组123例(40.7%),自行就诊组179例(59.3%)。急救转运组患者年龄、就诊时血糖均大于自行就诊组,男性及合并高血压病、冠心病和心房颤动比例均高于自行就诊组,组间差异均有统计学意义[(70±13)岁比(64±12)岁,t=-3.916;8(6,10)mmol/L比7(6,9)mmol/L,Z=-2.578;74.8%(92/123)比61.5%(110/179),χ^(2)=5.861;66.7%(82/123)比53.6%(96/179),χ^(2)=5.119;26.8%(33/123)比15.6%(28/179),χ^(2)=5.660;18.7%(23/123)比3.9%(7/179),χ^(2)=17.812;均P<0.05],糖尿病、高脂血症、卒中史、血压、发病前mRS评分的组间差异均无统计�
基金supported by the National Natural Science Foundation of China (41001277)the National 973 Program of China (2010CB95090102)
文摘This study explored spatial explicit multiple cropping efficiency （MCE） of China in 2005 by coupling time series remote sensing data with an econometric model - stochastic frontier analysis （SFA）. We firstly extracted multiple cropping index （MCI） on the basis of the close relationship between crop phenologies and moderate-resolution imaging spectroradiometer （MODIS） enhanced vegetation index （EVI） value. Then, SFA model was employed to calculate MCE, by considering several indicators of meteorological conditions as inputs of multiple cropping systems and the extracted MCI was the output. The result showed that 46% of the cultivated land in China in 2005 was multiple cropped, including 39% double- cropped land and 7% triple-cropped land. Most of the multiple cropped land was distributed in the south of Great Wall. The total efficiency of multiple cropping in China was 87.61% in 2005. Southwestern China, Ganxin Region, the middle and lower reaches of Yangtze River and Huanghuaihai Plain were the four agricultural zones with the largest rooms for increasing MCI and improving MCE. Fragmental terrain, soil salinization, deficiency of water resources, and loss of labor force were the obstacles for MCE promotion in different zones. The method proposed in this paper is theoretically reliable for MCE extraction, whereas further studies are need to be done to investigate the most proper indicators of meteorological conditions as the inputs of multiple cropping systems.
