Objectives To compare the difference in pulmonary function between Caucasians and Chinese and assess the best reference values of pulmonary function for Chinese adults.Methods Values for pulmonary function were pre...Objectives To compare the difference in pulmonary function between Caucasians and Chinese and assess the best reference values of pulmonary function for Chinese adults.Methods Values for pulmonary function were predicted by tests on 4773 Chinese healthy subjects (male: 2560, female: 2213, aged 15-78 years) in six parts (north, northeast, northwest, east, southwest and south) of China. Prediction equations of the European Community for Steel and Coal (ECSC), other equations for overseas Chinese or for Caucasians were also selected. The regression coefficients of forced vital capacity (FVC), forced expiratory volume in one second (FEV 1), FEV 1/FVC, total lung capacity (TLC) and residual volume (RV) were summarized. Results ECSC predictions were closer to the Chinese ones than other selected equations. Comparison with ECSC predictions showed that on average the values for FVC, FEV 1 were 5.3% smaller in Chinese males and 3.3% smaller in Chinese females, with the maximal differences in south China and the minimal differences in North China. RV and TLC in Chinese were lower than in Caucasians (males 4.8%, 5.5%, respectively; females 8.7% and 6.0%, respectively). Conversion factors were given for adjusting ECSC equations to fit Chinese. Conclusions For predicting values of pulmonary function in Chinese, we suggest to use the equations reported here. Alternatively, ECSC regression equations may be used with appropriate conversion factors.展开更多
目的 克隆并分析华南地区粉尘螨主要变应原Der f 2的cDNA片段。方法 广州地区收集、鉴定、培养的粉尘螨,提取总RNA,RT-PCR扩增其Der f 2片段,连接入T载体,测序和分析。结果 Der f 2片段长度为558bp,与GenBank公布的Der f 2(D10448)的核...目的 克隆并分析华南地区粉尘螨主要变应原Der f 2的cDNA片段。方法 广州地区收集、鉴定、培养的粉尘螨,提取总RNA,RT-PCR扩增其Der f 2片段,连接入T载体,测序和分析。结果 Der f 2片段长度为558bp,与GenBank公布的Der f 2(D10448)的核酸序列比较,在62个核苷酸处插入了87个核苷酸,插入点前后的核酸序列没有差异,按原读码框进行读码显示插入了29个氨基酸,插入点前后的氨基酸序列没有改变。结论 获得华南地区粉尘螨的Der f 2 cDNA片段,和已公布的序列相比,有较大差异。展开更多
文摘Objectives To compare the difference in pulmonary function between Caucasians and Chinese and assess the best reference values of pulmonary function for Chinese adults.Methods Values for pulmonary function were predicted by tests on 4773 Chinese healthy subjects (male: 2560, female: 2213, aged 15-78 years) in six parts (north, northeast, northwest, east, southwest and south) of China. Prediction equations of the European Community for Steel and Coal (ECSC), other equations for overseas Chinese or for Caucasians were also selected. The regression coefficients of forced vital capacity (FVC), forced expiratory volume in one second (FEV 1), FEV 1/FVC, total lung capacity (TLC) and residual volume (RV) were summarized. Results ECSC predictions were closer to the Chinese ones than other selected equations. Comparison with ECSC predictions showed that on average the values for FVC, FEV 1 were 5.3% smaller in Chinese males and 3.3% smaller in Chinese females, with the maximal differences in south China and the minimal differences in North China. RV and TLC in Chinese were lower than in Caucasians (males 4.8%, 5.5%, respectively; females 8.7% and 6.0%, respectively). Conversion factors were given for adjusting ECSC equations to fit Chinese. Conclusions For predicting values of pulmonary function in Chinese, we suggest to use the equations reported here. Alternatively, ECSC regression equations may be used with appropriate conversion factors.
文摘目的 克隆并分析华南地区粉尘螨主要变应原Der f 2的cDNA片段。方法 广州地区收集、鉴定、培养的粉尘螨,提取总RNA,RT-PCR扩增其Der f 2片段,连接入T载体,测序和分析。结果 Der f 2片段长度为558bp,与GenBank公布的Der f 2(D10448)的核酸序列比较,在62个核苷酸处插入了87个核苷酸,插入点前后的核酸序列没有差异,按原读码框进行读码显示插入了29个氨基酸,插入点前后的氨基酸序列没有改变。结论 获得华南地区粉尘螨的Der f 2 cDNA片段,和已公布的序列相比,有较大差异。
