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当前我们所面临的健康问题和过去的几代美国人所面临的健康问题有着很大的差别。传染性疾病的减少使我们的期望寿命有所提高,并且由于慢性病的逐渐增多,我们当前更加关心的问题不再是“死亡率”——死于疾病的人数之比率,而是“患病率”——患病的人数之比率。对患病率的分析有助于我们了解什么样的生活条件更利于生存。如果我们很清楚象关节炎、肺癌、酒精中毒、糖尿病这类常见病对人们的生活有着什么样的影响,我们就能更好地了解我们社会的生
The health problems we face today are very different from the health problems faced by past generations of Americans. The reduction of infectious diseases has increased our life expectancy, and due to the gradual increase in chronic diseases, the problem we are more concerned with is no longer the “mortality rate”—the ratio of the number of people dying from the disease, but the “prevalence rate”. " - The ratio of the number of people who have the disease. The analysis of prevalence helps us understand what kind of living conditions are more conducive to survival. If we are very clear about the impact of common diseases such as arthritis, lung cancer, alcoholism, and diabetes on people’s lives, we can better understand the lives of our society.