中老年人动脉血二氧化碳分压参考值的地理分布规律

Geographical Distribution Regularity of Reference Value of Partial Pressure of Arterial Carbon Dioxide for Middle-aged and Elderly People

目的研究我国健康中老年人动脉血二氧化碳分压参考值与地理因子之间的关系,为制定不同地域的标准提供科学依据。方法收集66个市县5038例健康中老年人的动脉血二氧化碳分压参考值,运用相关分析的方法研究其与地势、气候、土壤有关的25项地理指标之间的关系,并且推导出参考值与地理指标之间的回归方程:Y=4.029+0.7140X_3-0.002000X_4+0.9240X_5+0.8760X_9-0.9130X_(13)+4.599X_(14)±3.29。运用克里金插值法拟合出参考值的空间分布趋势图。结果动脉血二氧化碳分压参考值与地理指标间存在显著的相关关系。从大体上看,参考值的分布图呈现出东部高西南低的分布特征。结论若已知中国某地的纬度(X_3)、年日照时数(X_4)、年平均气温(X_5)、年平均风速(X_9)、表土碱度(X_(13))、表土盐分(X_(14)),可用此方程计算出该地区健康中老年人动脉血二氧化碳分压参考值,也可以通过查询参考值地理分布图得出某地区该参考值的范围。

Objective To research the relationship between reference value of PaCO2 for Chinese middle - aged and elderly people and geographical factors and to provide scientific evidence for establishing unified standard. Methods The reference values of PaCO2 were eolleeted from 5038 healthy middle - aged and elderly people in 66 cities and counties. The method of statistical analysis was utilized to study relationship between the reference value and 25 geographical factors, including terrain, climate and soil. The regression equation between them was derived by using the background elimination method. The regression equation was：Y = 4. 029 ＋ 0. 7140 X3 -0. 002000 X4 ＋ 0. 9240 X5 ＋ 0. 8760 X9 -0. 9130 XI3 ＋4. 599 X14 ± 3.29. Using Kriging interpolation method matehed the spatial distribution map of reference value of PaCO2 for Chinese healthy middle - aged and elderly people. Results It was found that there was a significant cor- relation between the reference value and geographical indices. In general, the spatial distribution map of reference value showed the distri- bution characteristics of higher in the east, lower in the southwest areas. Conclusion If we know the data of latitude（X3 ）, annual sun- shine duration（ X4 ） , annual mean air temperature（ X5 ） , annual average wind speed（ X9 ） , soil alkalinity（ XI3 ） and soil salinity（ X14 ） of a place in China, we can use this equation to calculate the reference value of PaCO2 for Chinese healthy middle - aged and elderly people of this place. Meanwhile, the value can also be obtained by drawing the spatial distribution map.