pmid:31071604, doi:10.1016/j.jss.2019.04.034, comparative study, zhaomin xu, adan z becerra, todd a jusko, aged, aged, 80 and over, antineoplastic combined chemotherapy protocols / therapeutic use*, asymptomatic diseases / mortality, asymptomatic diseases / therapy, chemotherapy, adjuvant / statistics & numerical data, chemotherapy, adjuvant / trends, colectomy / statistics & numerical data, colectomy / trends*, colonic neoplasms / mortality, colonic neoplasms / pathology, colonic neoplasms / therapy*, female, humans, kaplan-meier estimate, male, middle aged, neoplasm staging, registries / statistics & numerical data, retrospective studies, survival rate, treatment outcome, united states / epidemiology, pubmed abstract, nih, nlm, ncbi, national institutes of health, national center for biotechnology information, national library of medicine, medline