1. Bray F, Ferlay J, Soerjomataram I, Siegel RL, Torre LA, Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2018;68:394-424.
2. Siegel RL, Miller KD, Fedewa SA, et al. Colorectal cancer statistics, 2017. CA Cancer J Clin 2017;67:177-193.
4. Le H, Ziogas A, Lipkin SM, Zell JA. Effects of socioeconomic status and treatment disparities in colorectal cancer survival. Cancer Epidemiol Biomarkers Prev 2008;17:1950-1962.
6. Fleming ST, Mackley HB, Camacho F, et al. Clinical, sociodemographic, and service provider determinants of guideline concordant colorectal cancer care for Appalachian residents. J Rural Health 2014;30:27-39.
9. Parreira VG, Meira KC, Guimarães RM. Socioeconomic differentials and mortality from colorectal cancer in large cities in Brazil. Ecancermedicalscience 2016;10:614.
11. Van Cutsem E, Borràs JM, Castells A, et al. Improving outcomes in colorectal cancer: where do we go from here? Eur J Cancer 2013;49:2476-2485.
12. Loupakis F, Yang D, Yau L, et al. Primary tumor location as a prognostic factor in metastatic colorectal cancer. J Natl Cancer Inst 2015;107-dju427.
15. Ciani O, Buyse M, Garside R, et al. Meta-analyses of randomized controlled trials show suboptimal validity of surrogate outcomes for overall survival in advanced colorectal cancer. J Clin Epidemiol 2015;68:833-842.
16. Neugut AI, Matasar M, Wang X, et al. Duration of adjuvant chemotherapy for colon cancer and survival among the elderly. J Clin Oncol 2006;24:2368-2375.
19. Mondaca S, Villalón C, Leal JL, et al. Benefit of adjuvant 5-fluorouracil based chemotherapy for colon cancer: a retrospective cohort study. Rev Med Chil 2016;144:145-151.
20. Armando C, Bravo LE, Clín P, García LS, Collazos P. Colorectal cancer incidence, mortality and survival in Cali, Colombia, 1962-2012. Salud Publica Mex 2014;56:457-464.
21. Leufkens AM, Van Duijnhoven FJ, Boshuizen HC, et al. Educational level and risk of colorectal cancer in EPIC with specific reference to tumor location. Int J Cancer 2012;130:622-630.
22. Cavalli-Björkman N, Lambe M, Eaker S, Sandin F, Glimelius B. Differences according to educational level in the management and survival of colorectal cancer in Sweden. Eur J Cancer 2011;47:1398-1406.
24. Sonnenberg A, Turner KO, Genta RM. Ethnic variations in the occurrence of colonic neoplasms. United European Gastroenterol J 2017;5:424-431.
26. Robbins AS, Siegel RL, Jemal A. Racial disparities in stage-specific colorectal cancer mortality rates from 1985 to 2008. J Clin Oncol 2012;30:401-405.
28. White A, Joseph D, Rim SH, Johnson CJ, Coleman MP, Allemani C. Colon cancer survival in the United States by race and stage (2001-2009): findings from the CONCORD-2 study. Cancer 2017;123 Suppl 24(Suppl 24): 5014-5036.
30. Neuman HB, O’Connor ES, Weiss J, et al. Surgical treatment of colon cancer in patients aged 80 years and older: analysis of 31,574 patients in the SEER-Medicare database. Cancer 2013;119:639-647.
31. Liu F, Zhao J, Xie J, et al. Prognostic risk factors in patients with bone metastasis from colorectal cancer. Tumour Biol 2016;37:16127-16134.