Liu, Zhixin
Zhao, Dongsheng
Lin, Junkai
Chen, Xiali
Article History
Received: 30 January 2026
Accepted: 14 May 2026
First Online: 3 June 2026
Declarations
:
: Ethical approval for each DHS was obtained from the ICF Institutional Review Board and the relevant national ethics review committee in each country. Informed consent was obtained during the original surveys. This study used publicly available, de-identified DHS data and did not require additional ethical approval.
: Not applicable.
: The authors declare no competing interests.