title: Colorectal cancer screening in Health Examination Centers.
abstract: OBJECTIVE
  The aim of this study was to describe the results of colorectal cancer screening performed in the Health Examination Centers of the French general health insurance system.
  
  
  METHODS
  The population consisted of 1,262,833 subjects (52.6% men) aged 50 to 74 years old who attended periodic health consultations from 1998 to 2003 in 89 Health Examination Centers in France. Subjects with increased risk for colorectal cancer and subjects with a positive fecal occult blood test (Hemoccult II') were invited to undergo colonoscopy. Subsequent follow-up and diagnostic data were collected.
  
  
  RESULTS
  Prior screening practices for colorectal cancer (recent colonoscopy or fecal occult blood test, local screening campaign) were noted in 18% of the subjects attending Health Examination Center consultations. High risk for colorectal cancer (familial or personal factor) without ongoing surveillance or prior screening was observed in 3% of the study population. A fecal occult blood test was proposed to 79% of the population and of them, 89% effectively performed the test: 3.2% of tests were positive. A follow-up protocol was initiated for 63,357 subjects. A colonic exploration was performed in 69% of high-risk subjects and enabled detection of cancer in 85 and adenomas in 1683. A colonic exploration was performed in 88% of subjects with a positive fecal occult blood test and enabled detection of 674 cancers (positive predictive value of fecal occult blood test (PPV)=4.7%) including 174 Dukes A, and 2618 adenomas (PPV=18%) including 776 adenomas measuring more than 10 mm (PPV=5.4%).
  
  
  CONCLUSIONS
  This study confirms the importance of implementing organized screening practices within Health Examination Centers before undertaking a generalized screen campaign targeting the entire French population.
authors.affiliation: Centre Technique d'Appui et de Formation des Centres d'Examens de Santé, Saint Etienne. josiane.steinmetz@cetaf.asso.fr
authors.forename: Josiane
authors.initials: J
authors.lastname: Steinmetz
authors.forename: Yves
authors.initials: Y
authors.lastname: Spyckerelle
authors.forename: René
authors.initials: R
authors.lastname: Guéguen
authors.forename: Caroline
authors.initials: C
authors.lastname: Dupré
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000453:epidemiology; D000368:Aged; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D003625:Data Collection; D005260:Female; D005500:Follow-Up Studies; D005602:France / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D017410:Practice Guidelines as Topic; D011237:Predictive Value of Tests; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D013997:Time Factors