The mediating role of impulsivity between sleep quality and suicidal ideation in adolescent population: a multicenter cross-sectional study in the northeastern Sichuan, China.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work was financially supported by the Funding Project of the Bureau of Science and Technology and Intellectual Property of Nanchong City (20YFZJ0101) and Project of Affiliated Hospital of North Sichuan Medical College(2022LC014)."

"Utilizing a cross-sectional research method, a random cluster sampling was conducted to select adolescents from high school and middle school classes in 33 schools in Nanchong, Sichuan Province, China, between November 2021 and May 2022.To ensure data quality, all researchers underwent training in professional knowledge and questionnaire completion. The questionnaires were distributed in classes, with researchers and classroom teachers collaboratively guiding and monitoring the completion process. Researchers conveyed the survey’s purpose to adolescents and their parents at the site, stressing the confidentiality of responses and the adherence to principles of voluntariness and anonymity. Informed consent was obtained through an intelligent platform, with forms being signed by both participants and their parents. The questionnaire included an informed consent form at its outset, and access to the survey was conditional upon both parents and adolescents signing the form on the platform and clicking the agreement button. Adolescents completed the online questionnaire, which underscored that the data would be used solely for scientific research purposes and should be answered honestly. Out of the 6,974 distributed questionnaires 6,786 were included in the final analysis after eliminating responses with missing values, apparent contradictions, and fictitious data. All study procedures adhered to international ethical standards, including the Declaration of Helsinki as revised in 2008 and received approval from the Ethics Committee of Chuanbei Medical College (project number NSMC [2021] 53). The study was also reviewed by the Chinese Clinical Trials Registry (registration number ChiCTR2200058160)."