Bu, Fan
Deng, Xiao-hui
Zhan, Na-ni
Cheng, Hongtao
Wang, Zi-lin
Tang, Li
Zhao, Yu
Lyu, Qi-yuan
Article History
Received: 28 November 2022
Accepted: 14 February 2023
First Online: 27 March 2023
Declarations
:
: This is a retrospective study based on CHARLS database. The patient's information has been hidden before the study. There is no need for the patient's informed consent and no ethical conflict. The original CHARLS was approved by the Ethical Review Committee of Peking University (IRB00001052–11015), and all participants signed the informed consent at the time of participation. This research followed the guidance of the Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.