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Article History

Received: 6 February 2024

Accepted: 5 November 2024

First Online: 31 December 2024

Declarations

:

: Central ethical approvals were obtained from Oxford University and the China National CDC. Approvals were also obtained from institutional research boards at the local CDCs in the ten areas: Qingdao, Qingdao CDC; Heilongjiang, Provincial CDC; Hainan, Provincial CDC; Jiangsu, Provincial CDC; Guangxi, Provincial CDC; Sichuan, Provincial CDC; Gansu, Provincial CDC; Henan, Provincial CDC; Zhejiang, Provincial CDC; and Hunan, Provincial CDC. The study protocol of the resurvey was approved by the Peking University Institutional Review Board (No. IRB00001052-20040), and separate written informed consent was obtained from all participants before accelerometer data collection.

: Not applicable.

: The authors declare that they have no competing interests.