@article{chi2026-ca10c8ff, author = {Chi, W. and Liou, T. and Wang, W. and Yen, C. and Liao, H. and Huang, W. W.}, title = {{Prognostic heterogeneity within cognitive stages: a nationwide cohort study of everyday functional difficulties and mortality in 202,508 older adults}}, journal = {Research Square}, year = {2026}, doi = {10.21203/rs.3.rs-11248817/v1}, url = {https://doi.org/10.21203/rs.3.rs-11248817/v1} }