The relative effectiveness of fecal immunochemical test-based colorectal cancer screening to detect adenomas and cancer in different demographic and socioeconomic groups. A nationwide cohort study

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  • Mette Bach Larsen
  • Bo Søborg, 1. Faculty of Health and Sport Sciences, University of Agder, Kristiansand, Norway2. Clinical Research Unit, Randers Regional Hospital, Randers, Denmark3. Department of Pediatrics, Aarhus University Hospital, Denmark4. Department of Public Health, Aarhus University, Denmark5. Danish Center of Systematic Reviews in Nursing: an Affiliate Center of the Joanna Briggs Institute6. Department of Medicine and Technology, Aalborg University, Denmark.
  • ,
  • Sisse Helle Njor
  • Thomas Møller Jensen, Horsens Regional Hospital
  • ,
  • Peter Ingeholm, Herlev Hospital, Oncology, Herlev
  • ,
  • Berit Andersen

INTRODUCTION: This study aimed at analyzing the relative effectiveness in removal of adenomas and detection of cancer of implementing colorectal cancer (CRC) screening in different demographic and socioeconomic groups.

METHODS: This register-based retrospective cohort study included residents aged 50-72 years. Those randomly selected to be invited for CRC screening from 1 March 2014 to 30 June 2015 were classified as invited; those invited from 1 January 2016 to 31 December 2017 were classified as not yet invited. Strata-specific relative risks (RRs) of having adenomas removed and CRC detected were estimated.

RESULTS: A total of 1 343 090 individuals were included. The RR of having adenomas removed were higher among men compared with women [RRwomen = 6.41 (95% confidence interval [CI]: 5.08-8.09), RRmen = 7.74 (95% CI: 6.16-9.73), P < 0.01] and among Danes compared with immigrants [RRDanes = 4.71 (95% CI: 3.73-5.93), RRWestern = 4.76 (95% CI: 3.39-6.69), RRnon-Western = 3.35 (95% CI: 2.39-4.69), P = 0.03]. Regarding detection of CRC, the effectiveness increased with increasing age ranging from RR = 1.53 (95% CI: 0.93- 2.51) to RR = 1.97 (95% CI: 1.22-3.17) (P = 0.04) and was higher among men compared with women (RRwomen = 1.75 (95% CI: 1.10-2.76), RRmen = 2.07 (95% CI: 1.32-3.26), P = 0.02.

CONCLUSION: Attention must be paid to the potential differences in screening effectiveness among diverse subpopulations; first, by securing equal opportunities for participation across subpopulations and second, by considering sex and age-specific screening programs.

Original languageEnglish
JournalEuropean Journal of Cancer Prevention
Publication statusE-pub ahead of print - 26 Apr 2022

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