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Geographical distribution of the normal reference value of healthy adult males total lung capacity
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CAO Li-xia1,GE Miao1,HE Jin-wei1,WANG Zhi-kui2 1 Department of Geography,Shaanxi Normal University,Xian,710062 Shaanxi,China
2 College of Chemistry and Materials Science,Shaanxi Normal University,Xian,710062 Shaanxi,China Correspondence to CAO Lixia,Department of Geography,Shaanxi Normal University,Xian,710062 Shaanxi,China E-mail: caolixia0712@126.com or caolixia 0712@stu.snnu.edu.cn.
[Abstract]Objective The paper aims at supplying a basic for unifying the normal reference value standard of Chinese healthy adult males total lung capacity (TLC).Methods We gathered 4,079 examples of the normal value of healthy adult men in 60 areas in China,and researched the relationship between the reference value of Chinese healthy adult males TLC and the eight geographical factors(Altitude;Annual Sunshine Duration;Percentage of Sunshine Duration;Annual Mean Air Temperature;Annual Range of Air Temperature;Annual Mean Relative Humidity;Annual Precipitation Amount;Annual Mean Wind Speed) by using the method of correlative analysis and regression analysis.Results It is founded that the correlation of geographical factors and the reference value of Chinese healthy adult males TLC are quite significant (F=13.348,P=0.000).Applying the method of mathematical regression analysis,one regression equation is inferred:Y^=5.928+0.0003826X1+0.001972X2-0.1192X3+0.1172X4-0.002356X7+0.5298X8±0.916.Conclusions If geographical values are obtained in some areas,the normal value of Chinese healthy adult males TLC of this area can be reckoned by using the regression equation.Furthermore,according to the similarity of the normal reference value of Chinese healthy adult males TLC,China can be divided into eight regions:Northeast China District,North China District,Northwest China District,Shanxi-Shaanxi-Inner Mongolia District,Middle and lower reaches Yangtze River district,Southeast China District,Southwest China District and Qinghai-Tibet Plateau District.
[Document Indexing]
CAO Li-xia1,GE Miao1,HE Jin-wei1,WANG Zhi-kui2.Geographical distribution of the normal reference value of healthy adult males total lung capacity.Journal of Chinese Clinical Medicine,2008,3(7):398-404.
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