Beltrán-Sánchez Hiram, Preston Samuel H, Canudas-Romo Vladimir
Population Studies Center, University of Pennsylvania, 3718 Locust Walk, Philadelphia, PA 19104-6298.
Demogr Res. 2008 Jul 1;19:1323. doi: 10.4054/DemRes.2008.19.35.
This article integrates two methods that analyze the implications of various causes of death for life expectancy. One of the methods attributes changes in life expectancy to various causes of death; the other method examines the effect of removing deaths from a particular cause on life expectancy. This integration is accomplished by new formulas that make clearer the interactions among causes of death in determining life expectancy. We apply our approach to changes in life expectancy in the United States between 1970 and 2000. We demonstrate, and explain analytically, the paradox that cancer is responsible for more years of life lost in 2000 than in 1970 despite the fact that declines in cancer mortality contributed to advances in life expectancy between 1970 and 2000.
本文整合了两种分析各种死因对预期寿命影响的方法。其中一种方法将预期寿命的变化归因于各种死因;另一种方法则考察去除特定死因的死亡对预期寿命的影响。这种整合是通过新的公式实现的,这些公式更清晰地揭示了死因在决定预期寿命过程中的相互作用。我们将我们的方法应用于1970年至2000年美国预期寿命的变化情况。我们展示并通过分析解释了这样一个悖论:尽管癌症死亡率的下降在1970年至2000年期间推动了预期寿命的提高,但2000年因癌症而损失的生命年数却比1970年更多。