Hosmer D W, Lemeshow S
School of Public Health, University of Massachusetts, Amherst 01003, USA.
Stat Med. 1995 Oct 15;14(19):2161-72. doi: 10.1002/sim.4780141909.
This paper considers an index of hospital quality performance defined as the ratio of the observed number deaths to the number predicted by a fitted logistic regression model. We study tests and confidence intervals under two different scenarios depending on the availability of an estimate of the covariance matrix of the coefficients from the fitted logistic regression model. We propose parametric as well as bootstrap-based confidence intervals. We apply the methods to an analysis of the performance of 27 intensive care units.
本文考虑一种医院质量绩效指标，其定义为观察到的死亡人数与拟合逻辑回归模型预测的死亡人数之比。我们根据拟合逻辑回归模型系数协方差矩阵估计的可用性，在两种不同情况下研究检验和置信区间。我们提出了参数化以及基于自助法的置信区间。我们将这些方法应用于对27个重症监护病房绩效的分析。
