Context Maintaining independence of older persons is a public health priority, and identifying the factors that contribute to decline in physical function is needed to prevent or postpone the disablement process.

• 背景：维持老年人的独立生活能力是公众健康的首要问题，为了预防或延缓生活不能自理情况的出现需要确定哪些因素影响机体功能减退。