The accuracy of the FIT in detecting advanced neoplasm is highest in young people aged 40 to 49 years: an analysis based on sex and age.

"Declarations Ethics approval The study was approved by the Tianjin Union Medical Ethics Committee and conducted in accordance with the Declaration of Helsinki. Consent to participateParticipants signed informed consent forms before the study began. Conflict of interestThe authors declare no competing interests. Conflict of interest The authors declare no competing interests."

"Funding This research was supported by the Key Research Project of Tianjin Science and Technology Support Program (Approval No. 19YFZCSY00420), Tianjin Natural Science Foundation (21JCZDJC00060, 21JCYBJC00180 and 21JCYBJC00340), Tianjin Key Medical Discipline Construction Project (Approval No. TJYXZDXK-044A) and Hospital Management Research Project of Tianjin Hospital Association (Approval No. 2019ZZ07)."