平均住院日计算方法探讨

The Calculation Method for Average Hospitalization Days

目的 合理选择平均住院日计算方法。 方法 用算术平均数法、中位数法和几何均数法分别计算 2 0 0 1年和 2 0 0 2年北京市某三级甲等医院急性阑尾炎住院手术病人的平均住院日。 结果 两年急性阑尾炎手术病例住院日的频数分布均呈正偏态 ,对所有研究病例的住院日取对数值后频数分布近似正态分布。用三种方法分别计算该研究病种的平均住院日 ,结果算术平均数分别为 7.1d和 7.6 d、中位数分别为 6 .0 d和 7.0 d、几何均数分别为 6 .3d和 6 .6 d。 结论 计算平均住院日用几何均数法更为合理。

Objective Select a reasonable calculation method for average hospitalization days. Methods Calculate average hospitalization days those in-patients with acute appendicitis need for operation.Arithmetic mean, median and geometric mean were applied to a class A general hospital of level Ⅲ in Beijing in 2001 and 2002. Result The hospitalization days frequence distribution of acute appendicitis operated cases of the two years shows a positive skew distribution. The frequence distribution of its logarithm shows an approximate normal distribution. Arithmetic mean of hospitalization days of this disease in 2001 and 2002 is 7.1 days and 7.6 days, median is 6.0 days and 7.0 days, geometric mean is 6.3 days and 6.6 days respectively. Conclusion It is more reasonable to express the average hospitalization days by means of geometric average.