拟合方差与回归系数标准偏差存在明显的相关关系。线性模型能解释的方差越大，回归系数标准偏差越小。
It is found that the more the variance explained by the linear model, the smaller the standard deviation of regression coefficient.
在分析测定中适当改变标准物质的浓度，可简便回归系数的计算，加快处理分析数据的速度。
In the analysis and determination while the density of standard object is properly changed the tropic coefficient could be calculated simply and the speed of data process could be quickened.
结果：按标准化回归系数绝对值由大到小：氧合指数、CT、入院体温、体质量指数对ALI的影响最大；
Results: Standardization regression coefficient from big to small in proper order were: oxygenation index, CT, body temperature of the admission day, BMI were the most influence on ALI;
结果：按标准化回归系数绝对值由大到小：氧合指数、CT、入院体温、体质量指数对ALI的影响最大；
Results: Standardization regression coefficient from big to small in proper order were: oxygenation index, CT, body temperature of the admission day, BMI were the most influence on ALI;
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