Decoding the Effect of Frailty vs. Physiologic Age in Octogenarian and Nonagenarian Colectomy Outcomes for Colon...

Background/Objectives: Colorectal surgeons continue to care for an aging cancer population with increasing comorbidities and frailty. Frailty, characterized by a systemic physiologic decline associated with aging, is an increasingly popular focus in surgical outcomes research. This retrospective study investigates how frailty impacts outcomes in the octogenarian and nonagenarian populations undergoing surgical treatment for colon cancer. Methods: Data from the National Surgical Quality Improvement Program (NSQIP) colectomy-targeted variables dataset from 2015 to 2021 were utilized for this analysis, including patients 80 years of age and older. Frailty was assessed using the five-factor modified frailty index (mFI-5). The study examined post-operative outcomes across frailty groups in this population. Results: From 2015-2021, there were 10,671 patients aged 80 years and older who underwent colectomy for colon cancer, of whom 1259 (11.8%) were 90 years or older and 2844 (26.7%) were severely frail. Frailty significantly impacted post-operative colectomy outcomes in this population. On univariate analysis, frail patients had higher rates of pneumonia (p = 0.015), unplanned intubation (p = 0.012), stroke (p < 0.001), myocardial infarction (p = 0.011), readmission (p < 0.001), long length of stay (p < 0.001), and mortality (p < 0.001) compared to non-frail patients. On multivariate analysis, severe frailty (mFI-5 of 2 or more) was associated with an increased odds of unplanned intubation (aOR 2.41, 95% CI 1.27-4.59), long length of stay (aOR 1.73, 95% CI 1.44-2.09), readmission (aOR 1.84, 95% CI 1.42-2.39), and mortality (aOR 1.95, 95% CI 1.20-3.15) compared to non-frail patients. Conclusions: Frailty plays a critical role in influencing the outcomes of octogenarians and nonagenarians undergoing colectomy for colon cancer within the NSQIP dataset. Future work should investigate whether addressing frailty prior to surgery in this population can improve patients' post-operative courses.