The US federal government has done a survey of the contribution of health care to diseases, and discovered that medical technology is the most costly but has the least contribution to reducing disease, but that improvements in people's life styles and environment is the least expensive but most contributing item.
美國聯邦政府曾作過一項「醫療對疾病的貢獻」調查，發現醫療技術是支出最多，卻對減少疾病貢獻最少的一項；而人們對自己生活和大環境的改善則是支出最少，卻貢獻最多的一項。