Inequalities in self-reported physical health in the United States, 1993-1999
利用1993-1999年行为风险因素监测系统数据，计算广义熵指数等指标，发现美国自评身体健康天数的不平等在1993-1999年间增加了17%，且不同收入、教育、种族和年龄组间差异显著。
This study investigated inequalities in physically healthy days in the United States during 1993-1999, by socioeconomic and demographic group. The generalized entropy GE(2) and other indices were computed using data from the Behavioral Risk Factor Surveillance System survey, 1993-1999. The results indicate that GE(2) for the US population increased by 17% during 1993-1999. Low-to-middle income groups had the highest increases in inequalities during this time (51-66%), whereas the least educated, Asian/Pacific Islanders, American Indians/Alaska Natives, the oldest, the youngest, and the richest had the lowest (-14-10%). In 1999, inequalities ranged from 0.0153 (income>or=$50 000) to 0.112 (income<$10 000). Inequalities have increased during 1993-1999 and vary substantially across groups. The American Indians/Alaska Natives experienced the highest inequalities whereas Asians/Pacific-Islanders exhibited the lowest inequalities. More attention should be given to within-group inequalities.