The term "healthy life expectancy" has been developed to describe the number of years one can expect to live in relatively good health. ... In developing countries, losing the ability to walk may be associated with even greater risks of adverse outcomes because walking is often the most common means of transportation.
――明治学院大学 経済学部経済学科・社会学部社会福祉学科(2月7日実施)――2005年