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Purpose:For elderly people,homebound is related to their decrease in energy for physical activity,and to their becoming progressively more bedridden.With the elderly making up 20.0% ofthe Japanesepopulation,the highest in the world,we sought to clarify the factors related to their homebound;in order to prevent them from becoming bedridden,in other words from being in a condition that requires nursing care,it is thought to be absolutely imperative to prevent them from becoming homebound.