Predictors and influence of postoperative moderate-to-severe pain of PACU in the patients with malignancy.

"Declarations Ethics approval and consent to participateThe study was conducted in accordance with the Declaration of Helsinki, and approved by the Clinical Research Ethics Committee of the First Affiliated Hospital of Wenzhou Medical University (No.KY2021-097), and registered in the Chictr.org.cn registration system on 06/12/2021 (ChiCTR2100054013). Informed consent was obtained from all subjects involved in the study. Consent for publicationNot Applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Project 2021Y0335 supported by Wenzhou Science and Technology Bureau and Project 2023ZL086 supported by Zhejiang Traditional Chinese Medicine Administration. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript."

"Trial registration The study was approved by the Clinical Research Ethics Committee of the First Affiliated Hospital of Wenzhou Medical University (No.KY2021-097) and registered in the Chictr.org.cn registration system on 06/12/2021 (ChiCTR2100054013)."