Relationship between Body Roundness Index and cognitive impairment in middle-aged and older adults: a population-based cross-sectional study - Guo, Dandan; Li, Tao; Yang, Qingchao; Yang, Chenlu; Yang, Yang; Liu, Fuchen; Ma, Jun; Tu, Jun; Ning, Xianjia; Wang, Jinghua; Song, Chengyuan; Liu, Yiming (Frontiers in Aging Neuroscience, 2025)