Abstract
Introduction
This nationwide study assessed the impact of Lynch syndrome-related risk management guidelines on clinicians’ recommendations of risk management strategies to carriers of pathogenic variants in mismatch repair genes and the extent to which carriers took up strategies in concordance with guidelines.
Materials and methods
Clinic files of 464 carriers (with and without colorectal cancer) were audited for carriers who received their genetic testing results in July 2008–July 2009 (i.e. before guideline release), July 2010–July 2011 and July 2012–July 2013 (both after guideline release) at 12 familial cancer clinics (FCCs) to ascertain the extent to which carriers were informed about risk management in accordance with guidelines. All carriers captured by the audit were invited to participate in interviews; 215 were interviewed to assess adherence to recommended risk management guidelines.
Results
The rates of documentation in clinic files increased significantly from pre- to post-guideline for only two out of eight risk management strategies. The strategies with the highest compliance of carriers post-guidelines were: uptake of one or two-yearly colonoscopy (87%), followed by hysterectomy to prevent endometrial cancer (68%), aspirin as risk-reducing medication (67%) and risk-reducing salpingo-oophorectomy (63%). Interrater reliability check for all guidelines showed excellent agreement (k statistics = 0.89).
Conclusion
These results indicate that there is scope to further increase provision of advice at FCCs to ensure that all carriers receive recommendations about evidence-based risk management. A multi-pronged behaviour change and implementation science approach tailored to specific barriers is likely to be needed to achieve optimal clinician behaviours and outcomes for carriers.
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Acknowledgements
We are very grateful to the participants in this research. Bettina Meiser is supported by a National Health and Medical Research Council (NHMRC) Senior Research Fellowship Level B (ID 1078523). Michelle Peate is supported by a University of Melbourne MDHS Research Fellowship. This study was funded by a Strategic Research Partnership Grant (SRP 13-02) from the Cancer Council of New South Wales.
ICCon Audit Study Collaborative Group: The additional members of the Inherited Cancer Connect (ICCon) Audit Study Collaborative Group are: Genetic Health Queensland (R. Susman); Genetics Services Western Australia (N. Pachter); Liverpool Hospital (A. Goodwin); Peter MacCallum Cancer Centre (P. James, L. Mascarenhas, C. Morton, S. Shanley, M.A. Young); Peter MacCallum Cancer Centre (P. James, L. Mascarenhas, C. Morton, S. Shanley, M.A. Young); Prince of Wales Hospital (L. Andrews, E.A. Morrow, K. Tucker); Royal Melbourne Hospital (P. James, G. Lindeman, L. Mascarenhas, C. Morton); Royal North Shore Hospital (M. Field); Royal Prince Alfred (A. Goodwin); South Australian Clinical Genetics Services (M. Monnik, N. Poplawski); Austin Hospital (M. Delatycki, T. John); Monash Health (M. Harris) and UNSW Sydney (R. Kerr, B. Vora).
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Bettina Meiser has a remunerated consultant role with the company Astrazeneca with respect to an unrelated project. None of the other authors have conflicts of interest to report.
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The study was approved by the Peter MacCallum Cancer Centre and King Edward Memorial Hospital Human Research Ethics Committees. All interviewees gave their consent for publication of their interview data.
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The members of ICCon Audit Study Collaborative Group are listed in Acknowledgment
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Meiser, B., Kaur, R., Kirk, J. et al. Evaluation of implementation of risk management guidelines for carriers of pathogenic variants in mismatch repair genes: a nationwide audit of familial cancer clinics. Familial Cancer 19, 337–346 (2020). https://doi.org/10.1007/s10689-020-00183-4
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DOI: https://doi.org/10.1007/s10689-020-00183-4