Development of early prediction model of in-hospital cardiac arrest based on laboratory parameters.

"Declarations Ethics approval and consent to participateThis study was conducted according to Helsinki's statement and has been reviewed and approved by the ethics committee of The First Medical Center of Chinese PLA General Hospital (Ethics approval number: S2023-282-01).This study is a retrospective electronic medical record study, so the ethics committee of The First Medical Center of Chinese PLA General Hospital exempted patients from informed consent. Consent for publicationAll authors consent to the publication. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This study was supported by Major Science and Technology Program of Hainan Province (No. ZDKJ202004), National Key Research and Development Program of China (No. 2019YFC0119600), and Research on new concept of intelligent first aid for weapon injury (2022SYSZZKY17)."