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Sex is a stronger predictor of colorectal adenoma and advanced adenoma than fecal occult blood test

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Abstract

Due to high costs and limited availability of screening colonoscopy, some screening programs require a positive fecal occult blood test (FOBT) before screening colonoscopy is remunerated. As male sex is a strong predictor of adenoma and advanced adenoma, we evaluated whether a positive FOBT or male sex is a stronger risk factor for adenoma and advanced adenoma. FOBT and screening colonoscopy results from 18.665 consecutive patients participating in a “national health check program” between 2009 and 2011 were included in this cohort study. Age-corrected adenoma detection rates (ADR), advanced adenoma detection rates (AADR) and carcinoma detection rates were calculated for men and women according to FOBT result separately. ADR and AADR in FOBT-positive men (34.6 and 11.8 %) and FOBT-negative men (29.1 and 7.6 %) were higher than ADR and AADR in FOBT-positive women (20 and 6.9 %) and in FOBT-negative women (17.6 and 4.4 %), (p = 0.0003). Men with negative FOBT were at higher risk of having an adenoma and advanced adenoma than women with positive FOBT (p < 0.0001). Odds ratios of a positive FOBT for ADR and AADR were 1.3 (1.1–1.5) (p = 0.0047) and 1.6 (1.2–2.1) (p < 0.0001), respectively. Odds ratios of male sex to predict ADR and AADR were significantly higher with 1.9 (1.8–2.1) and 1.8 (1.6–2), respectively (p < 0.001). Male sex is a stronger predictor for colorectal adenoma and advanced adenoma than positive FOBT. These results should be taken into account analyzing FOBT-based screening programs.

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Acknowledgments

We would like to thank all participants of the project for their support and data input. A list of contributing endoscopists is available online at www.vorsorgekoloskopie.at and www.krebshilfe.net. We would like to thank Josef Probst, PhD from Austrian Federation of the Statutory Insurance Institutions, Vienna, Austria, for his support in the organization. The project “Quality certificate for screening colonoscopy” was conducted in cooperation with the Main Association of Austrian Social Security Institutions and funded by fund § 447h ASVG (Fund for preventive checkups and health promotion).

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Correspondence to Monika Ferlitsch.

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Ferlitsch, M., Heinze, G., Salzl, P. et al. Sex is a stronger predictor of colorectal adenoma and advanced adenoma than fecal occult blood test. Med Oncol 31, 151 (2014). https://doi.org/10.1007/s12032-014-0151-0

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