AUTHOR=Liu Wenna , Wang Shutong , Gu Hanyang , Li Rong TITLE=Heart rate variability, a potential assessment tool for identifying anxiety, depression, and sleep disorders in elderly individuals JOURNAL=Frontiers in Psychiatry VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2025.1485183 DOI=10.3389/fpsyt.2025.1485183 ISSN=1664-0640