1. Programmes and projects; Aging and life course; Facts about ageing [Internet]. World Health Organization. cited 2007 Aug 20. Available from:
http://www.who.int/ageing/en/.
2. Kim JS, Bae SI, Cho MK, Choi ID. Report 2005-15. A Prospect about Long-term Insurance Finance of Old People and Policy. 2005. Seoul: National Health Insurance Corporation.
3. Ministry of Health and Welfare. Annual Report of the Korea Central Cancer Registry 2001. 2003.
4. Ministry for Heath, Welfare and Family Affairs. Annual Report of cancer incidence (2005) and survival (1993~2005) in Korea. 2008.
5. Damhuis RA, Wereldsma JC, Wiggers T. The influence of age on resection rates and postoperative mortality in 6457 patients with colorectal cancer. Int J Colorectal Dis. 1996. 11:45–48.
6. Umpleby HC, Bristol JB, Rainey JB, Williamson RC. Survival of 727 patients with single carcinomas of the large bowel. Dis Colon Rectum. 1984. 27:803–810.
7. Vironen JH, Sainio P, Husa AI, Kellokumpu IH. Complications and survival after surgery for rectal cancer in patients younger than and aged 75 years or older. Dis Colon Rectum. 2004. 47:1225–1231.
8. Patel SA, Zenilman ME. Outcomes in older people undergoing operative intervention for colorectal cancer. J Am Geriatr Soc. 2001. 49:1561–1564.
9. Takeuchi K, Tsuzuki Y, Ando T, Sekihara M, Hara T, Kori T, et al. Should patients over 85 years old be operated on for colorectal cancer? J Clin Gastroenterol. 2004. 38:408–413.
10. Dimick JB, Cowan JA Jr, Upchurch GR Jr, Colletti LM. Hospital volume and surgical outcomes for elderly patients with colorectal cancer in the United States. J Surg Res. 2003. 114:50–56.
11. Bufalari A, Giustozzi G, Burattini MF, Servili S, Bussotti C, Lucaroni E, et al. Rectal cancer surgery in the elderly: a multivariate analysis of outcome risk factors. J Surg Oncol. 2006. 93:173–180.
12. Suh HS, Lee KH, Kim HC, Yu CS, Kim JC. The postoperative impact of co-morbidity in colorectal cancer surgery. J Korean Soc Coloproctol. 2003. 19:299–306.
13. Gonzalez EC, Ferrante JM, Van Durme DJ, Pal N, Roetzheim RG. Comorbid illness and the early detection of cancer. South Med J. 2001. 94:913–920.
14. Anderson JH, Hole D, McArdle CS. Elective versus emergency surgery for patients with colorectal cancer. Br J Surg. 1992. 79:706–709.
15. Biondo S, Pares D, Frago R, Marti-Rague J, Kreisler E, De Oca J, et al. Large bowel obstruction: predictive factors for postoperative mortality. Dis Colon Rectum. 2004. 47:1889–1897.
16. Lee YM, Law WL, Chu KW, Poon RT. Emergency surgery for obstructing colorectal cancers: a comparison between right-sided and left-sided lesions. J Am Coll Surg. 2001. 192:719–725.
17. Kelley WE Jr, Brown PW, Lawrence W Jr, Terz JJ. Penetrating, obstructing, and perforating carcinomas of the colon and rectum. Arch Surg. 1981. 116:381–384.
18. Lee JM, Kim HC, Park IJ, Kim DD, Yu CS, Kim JC. The characteristics of colorectal cancer in patients older than 80 years. J Korean Soc Coloproctol. 2007. 23:490–496.
19. Pavlidis TE, Marakis G, Ballas K, Rafailidis S, Psarras K, Pissas D, et al. Safety of bowel resection for colorectal surgical emergency in the elderly. Colorectal Dis. 2006. 8:657–662.