title: [An analysis of results of the elderly colorectal cancer screening study].
abstract: OBJECTIVE
  To evaluate the detection rates of colorectal polyps and cancer in the elderly and characterize the pathological features of the colorectal neoplasm in DongLi District in Tianjin.
  
  
  METHODS
  Totally, 46 743 subjects aged 60-74 were recruited from the national colorectal cancer screening program, including subjects registered from November 2012 to April 2013 in DongLi District in Tianjin. Each subject completed a questionnaire and a fecal occult blood test. Colonoscopies were conducted in 434 subjects with high risk for colorectal cancer.
  
  
  RESULTS
  Among all the subjects, 2 880 were at high risk for colorectal cancer which accounts for 6.16% (2 880/46 743) of the total subjects. Among the subjects who underwent the colonoscopy, 165 (men: 105, women: 60) were colorectal polyps accounting for 5.73% (165/2 880) in the total risk, with 51 subjects (1.77%) advanced neoplasms and 4 subjects (0.14%) cancer. The detection rates of colorectal polyps is 0.35% (165/46 743), and colorectal cancer is 8.6/10(5) (4/46 743). More polyps were found on the left colon compared with the right. More tubular adenoma was found compared with the other pathological types. Most of the polyps were smaller than 0.5 cm. Colorectal polyps and advanced neoplasms were more frequent in men than women [45.45% (105/231) vs 29.56% (60/203), 16.02% (37/231) vs 6.90% (14/203), all P < 0.01]. Multiple polyps (P < 0.05) and polyps with diameter larger than 1.0 cm (P < 0.01) were more often in men than in women. Men tended to have more colorectal polyps in right colon and higher detection rate for moderate or sever atypical hyperplasia than women (all P < 0.05).
  
  
  CONCLUSIONS
  There is a higher incidence of colorectal polyps in the elderly. It is important to establish the national sequential colorectal cancer screening program for the early diagnoses of colorectal polyps and cancer in the elderly.
authors.forename: Chunlin
authors.initials: C
authors.lastname: Zhang
authors.forename: Yuhai
authors.initials: Y
authors.lastname: Fang
authors.forename: Zhifei
authors.initials: Z
authors.lastname: Hong
authors.forename: Qingwei
authors.initials: Q
authors.lastname: Jiang
authors.forename: Wenbin
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China. Email: lijn2008@126.com.
authors.forename: Jingnan
authors.initials: J
authors.lastname: Li
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000453:epidemiology; D000368:Aged; D002681:China / Q000453:epidemiology; D003111:Colonic Polyps / Q000175:diagnosis / Q000453:epidemiology; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D055088:Early Detection of Cancer; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009780:Occult Blood; D011795:Surveys and Questionnaires