The preventive strategies for patients with two levels of elderly disability should have different focuses.doi:10.1186/s12889-023-16455-4Wu, HengjingTongji UnivLi, YaoShanghai Univ Tradit Chinese MedRen, LongbingLi, JueWang, YiyanJiang, ChenghuaWu, JingBioMed CentralBMC Public Health...