Mortality and morbidity after colorectal cancer resection surgery in elderly patients: a retrospective population-based study in Sweden.

"Declarations Ethics approval and consent to participateThe research was made in accordance with the Declaration of Helsinki. The study was approved by the Swedish Ethical Review Authority (registration number 2021–02099). In accordance with Swedish legislation, patients were informed about their partaking in national quality registers and were entitled to having their data removed upon request. Therefore, consent of participation in this study is not applicable. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open access funding provided by University of Gothenburg. The study is supported by the Department of Research and Development, Fyrbodal (VGFOUFBD-937668), and Västra Götalandsregionen (VGFOUREG-940671, VGFOUREG-931040). The funding parties have no role in the design of the study or collection, analysis, or interpretation of data, neither in writing of the manuscript."

"Declarations: Ethics approval and consent to participateThe research was made in accordance with the Declaration of Helsinki. The study was approved by the Swedish Ethical Review Authority (registration number 2021–02099). In accordance with Swedish legislation, patients were informed about their partaking in national quality registers and were entitled to having their data removed upon request. Therefore, consent of participation in this study is not applicable.: Consent for publicationNot applicable.: Competing interestsThe authors declare no competing interests. Ethics approval and consent to participate: The research was made in accordance with the Declaration of Helsinki. The study was approved by the Swedish Ethical Review Authority (registration number 2021–02099). In accordance with Swedish legislation, patients were informed about their partaking in national quality registers and were entitled to having their data removed upon request. Therefore, consent of participation in this study is not applicable."