title: [Survival rate of colorectal cancer patients during 2005-2010 in Zhejiang province, China].
abstract: OBJECTIVE
  To analyze the survival rate of colorectal cancer, using data from the population-based cancer registry during 2005-2010 in Zhejiang.
  
  
  METHODS
  The last follow-up activities on 17 235 cases regarding the survival status was December 31, 2012. Both cumulative observed survival rate (OS) and relative survival rate (RS) were calculated with SURV 3.01 software drawn up by Hakulinen.
  
  
  RESULTS
  The OS on 1, 3 and 5 year were 76.71%, 58.14%, 50.58% and the RS on 1, 3 and 5 year were 78.93% , 63.48% , 58.73% , respectively. The 1, 3 and 5 year relative survival rates on males vs. females were 79.36% vs. 78.35% , 63.63% vs. 63.29%, and 58.85% vs. 58.57%, respectively and the difference between them was not statistically significant (χ(2) = 1.08, P = 0.298). The 5 year OS and RS of the urban population were 55.06% and 64.09% and the 5 year OS and RS of the rural population were 47.59% and 55.16%, with statistically significant differences (χ(2) = 85.84, P < 0.001). The 55-64 age group appeared higher relative survival rate. There were significant differences in the survival rates among different age groups (χ(2) = 333.42, P < 0.001). The 5 year RS of colon vs. rectum were 61.47% vs. 56.45% . Colon patients showed better relative survival rate (χ(2) = 7.26, P < 0.05).
  
  
  CONCLUSIONS
  The wide variations in colorectal cancer survival rates were seen between the urban and rural populations. Public health resources should be focused on rural areas. Patients younger than 55 years should be under specific attention to further understand the related factors which influencing the prognosis of the diseases.
authors: Department of Preventive Medicine, Medical School of Ningbo University, Ningbo 315211, China.
authors: Sheng-lan
authors: SL
authors: Luo
authors: Zhejiang Provincial Center for Disease Control and Prevention.
authors: Ru-ying
authors: RY
authors: Hu
authors: Zhejiang Provincial Center for Disease Control and Prevention.
authors: Wei-wei
authors: WW
authors: Gong
authors: Zhejiang Provincial Center for Disease Control and Prevention.
authors: Hao
authors: H
authors: Wang
authors: Zhejiang Provincial Center for Disease Control and Prevention.
authors: Jin
authors: J
authors: Pan
authors: Zhejiang Provincial Center for Disease Control and Prevention.
authors: Fang-rong
authors: FR
authors: Fei
authors: Zhejiang Provincial Center for Disease Control and Prevention. Email: myu@cdc.zj.cn.
authors: Min
authors: M
authors: Yu
mesh_terms: D000328:Adult; D000368:Aged; D002681:China / Q000453:epidemiology; D003110:Colonic Neoplasms / Q000453:epidemiology* / Q000401:mortality*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000453:epidemiology* / Q000401:mortality*; D012424:Rural Population; D015996:Survival Rate; D014505:Urban Population