Perioperative outcome, long-term mortality and time trends in elderly patients undergoing low-, intermediate- or major non-cardiac surgery.

"Declarations Conflict of interestThis manuscript has been submitted solely to this journal and is not in press or submitted elsewhere. Parts of this manuscript have been published in the author’s thesis [33]. All authors have read and approved the manuscript. There is no commercial association that might pose a conflict of interest relevant to this paper. Statement of human and animal rightsThe Medical Ethical Committee (METC) of the Erasmus University Medical Centre granted a formal statement and approved the non-interventional character of this study on September 25th, 2018. Patients were not subjected to acts, neither was any mode of behavior imposed, otherwise than as part of their regular treatment. Therefore, according to Dutch law, written informed consent for a patient to be enrolled in this study was not required [10, 11]. The study was conducted in compliance with the Helsinki declaration. Conflict of interest This manuscript has been submitted solely to this journal and is not in press or submitted elsewhere. Parts of this manuscript have been published in the author’s thesis [33]. All authors have read and approved the manuscript. There is no commercial association that might pose a conflict of interest relevant to this paper."