BACKGROUND:There have been conflicting reports regarding a protective effect of statin therapy after colon cancer surgery.OBJECTIVE: This study aimed to evaluate the association between statin therapy and the postoperative mortality following elective colon cancer surgery.
DESIGN:This population-based cohort study is a retrospective analysis of prospectively collected data from the Swedish Colorectal Cancer Register.
SETTINGS:Patient inclusion was achieved through a nationwide register.
PATIENTS:All adult patients undergoing elective surgery for colon cancer between January 2007 and September 2016 were included in the study. Patients who had received and collected a prescription for statins pre-and postoperatively were allocated to the statin-positive cohort.
MAIN OUTCOME MEASURES:The primary and secondary outcomes of interest were 90-day all-cause mortality and 90-day cause-specific mortality.RESULTS: A total of 22,337 patients underwent elective surgery for colon cancer during the study period, of whom 6,494 (29%) were classified as statin users. Statin users displayed a significant survival benefit despite being older, having a higher comorbidity burden, and being less fit for surgery. Multivariate analysis illustrated significant reductions in the incidence risk for 90-day allcause mortality (Incidence Rate Ratio = 0.12, p < 0.001) as well as 90-day cause-specific deaths due to sepsis, due to multiorgan failure, or resulting from a cardiovascular and respiratory origin.
LIMITATIONS:The limitations of this study include its observational retrospective design, restricting the ability to perform standardized follow-up of statin therapy. Confounding from other uncontrolled variables cannot be excluded.
CONCLUSIONS:Statin users had a significant postoperative benefit regarding short-term mortality following elective colon cancer surgery in the current study; however, further research is needed to ascertain whether this relationship is causal. See Video Abstract at http://links.lww.com/DCR/B738.