Dual-task turn velocity - a novel digital biomarker for mild cognitive impairment and dementia.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work was partially supported by the Jiangsu Province Cadre Health Project (grant no. BJ19008). The leader project of clinical technology application research of Jiangsu elderly health research project (project LR2021011). Study on the intervention effect of intestinal flora debugging on elderly patients with sarcopenia (project 2020YFC2005604-5). Clinical technology application research project unit of Jiangsu Province Geriatric Health Research Project (project LR2021024). Suzhou Medical Key Discipline Construction Project (project SZXK202101)."