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Article History

Received: 23 October 2022

Accepted: 3 May 2023

First Online: 7 June 2023

Declarations

:

: All investigations were performed in accordance with relevant guidelines and regulations (such as the Declaration of Helsinki). The institutional review board of Xiangya School of Public Health (XYGW-2021-64) reviewed and approved the studies involving human participants. Additionally, approval was obtained from the leaders of various nursing homes. The Ethics Committee of Xiangya School of Public Health, Central South University approved and confirmed the oral informed consents of the participants, which were considered equivalent to written informed consent. All participants provided either written or oral informed consent to participate in the study.

: Not applicable.

: The authors declare that they have no competing interests.