Implementation of Optical Diagnosis for Diminutive Polyps Amongst Endoscopists: Training and Long-term Quality Assurance (DISCOUNT2)
Implementation of Optical Diagnosis for Diminutive Polyps Amongst Accredited Endoscopists for the Dutch Bowel Cancer Screening Program: Training and Long-term Quality Assurance
Visão geral do estudo
Status
Status
Condições
Condições
Intervenção / Tratamento
Intervenção / Tratamento
Descrição detalhada
Through the recently started nationwide bowel cancer screening programme in the Netherlands, an extra 70.000 colonoscopies are annually performed. In current practice, all resected colonic lesions are histopathologically analysed. Even diminutive polyps, which rarely harbour cancer or advanced histological features. If endoscopists are able to accurately differentiate between neoplastic and non-neoplastic lesions during colonoscopy, practice could become more efficient and costeffective. This strategy is called optical diagnosis and two clinical practice strategies have been proposed by the American Society of Gastroenterologists (ASGE). First, diminutive polyps could be resected and discarded if >90% of the surveillance intervals predicted on optical diagnosis correlate with the surveillance intervals after histopathological validation (if assessed with high confidence). Second, hyperplastic polyps in the rectosigmoid could be left in situ if endoscopists are able to confidently predict neoplastic histology of diminutive colorectal polyps with a negative predictive value (NPV) of ≥90%.
The accuracy of white light colonoscopy is not acceptable for daily practice (59%-84%), but narrow band imaging (NBI) allows higher accuracies up to 98% and it was demonstrated that experienced endoscopists could reach a NPV of ≥90% for diminutive colorectal lesions. However, recent research shows that community gastroenterologists are not able to meet the quality thresholds proposed by the ASGE. Before this strategy could be safely applied in daily practice, community gastroenterologists should be able to meet thresholds as well.
In this study, Dutch gastroenterologists who are certified for performing colonoscopies on FIT-positive patients in the Dutch population screening program, are trained in optical diagnosis with validated methods. After training, an ex- and in-vivo test phase leads to "accreditation" and endoscopists will be observed in their optical diagnosis for 1 year. During this year, half of the endoscopists will be randomized towards 3-monthly feedback and the other half will receive feedback on their results after 1 year. The endoscopic prediction of endoscopists on polyp histology will be compared to histopathological outcome.
Tipo de estudo
Tipo de estudo
Inscrição (Real)
Inscrição
Contactos e Locais
Locais de estudo
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Alkmaar, Holanda
- Medisch Centrum Alkmaar
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Almere, Holanda
- Flevoziekenhuis
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Amstelveen, Holanda
- Amstelland Ziekenhuis
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Amsterdam, Holanda
- Onze Lieve Vrouwe Gasthuis
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Amsterdam, Holanda
- Slotervaart Ziekenhuis
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Amsterdam, Holanda
- Sint Lucas Andreas Ziekenhuis
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Amsterdam, Holanda
- Antonie van Leeuwenhoek Ziekenhuis
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Beverwijk, Holanda
- Rode Kruis Ziekenhuis
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Haarlem, Holanda
- Kennemer Gasthuis
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Hoofddorp, Holanda
- Spaarne Ziekenhuis
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Hoorn, Holanda
- West Fries Gasthuis
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Nieuwegein, Holanda
- Sint Antonius Ziekenhuis
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Utrecht, Holanda
- Diakonessenhuis
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Critérios de participação
Critérios de elegibilidade
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Método de amostragem
População do estudo
Descrição
Inclusion Criteria:
- Colonoscopies performed in FIT positive patients obtained for the Dutch colorectal cancer screening program.
Exclusion Criteria:
- Colonoscopies in patients with a history of colorectal cancer, inflammatory bowel disease or polyposis syndrome.
- Colonoscopies in patients with bleeding disorders or anticoagulants and therefore cannot undergo polypectomy.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
Número de grupos/coortes
Coortes e Intervenções
Grupo / CoorteGrupo / Coorte |
Intervenção / TratamentoIntervenção / Tratamento |
|---|---|
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Endoscopists
Approximately 35 endoscopists whom are certified to perform colonoscopies on FIT-positive patients in the Dutch population screening program
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3-monthly or no 3-monthly feedback on results of optical diagnosis
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Colonoscopies
Colonoscopies on FIT-positive patients in the Dutch population screening program
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Device
Olympus colonoscopes with Narrow Band Imaging
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O que o estudo está medindo?
Medidas de resultados primários
Medidas de resultados primários
Medida de resultado |
Prazo |
|---|---|
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the number of training rounds needed until endoscopists reach a clinical acceptable accuracy of predicting histology of subcentimetric (1-9 mm) colorectal lesions using NBI
Prazo: 18 months
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18 months
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the number of qualified endoscopists that are able to maintain a clinical acceptable accuracy of predicting histology of subcentimetric (1-9 mm) colorectal lesions using NBI over a year, either with and without regular interim feedback.
Prazo: 18 months
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18 months
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Medidas de resultados secundários
Medidas de resultados secundários
Medida de resultado |
Prazo |
|---|---|
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the number of the accredited endoscopists that is able to reach a negative predictive value of at least 90% for predicting neoplastic diminutive (1-5mm) and small (6-9mm) colorectal lesions in the rectosigmoid
Prazo: 18 months
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18 months
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the number of diminutive (1-5mm) and small (6-9mm) lesions that are correctly predicted with high confidence
Prazo: 18 months
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18 months
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the number of patients in whom a surveillance interval (according to the Dutch surveillance guideline) can be advised directly after colonoscopy, based on the endoscopic diagnosis
Prazo: 18 months
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18 months
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the number of patients in whom the surveillance interval (according to the Dutch surveillance guideline) is correctly predicted based on endoscopic diagnosis
Prazo: 18 months
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18 months
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the number of correctly diagnosed sessile serrated adenoma/polyps in diminutive (1-5mm) and small (6-9mm) polyps
Prazo: 18 months
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18 months
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the sensitivity for predicting neoplastic histology per endoscopist, time frame and feedback or no feedback group
Prazo: 18 months
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18 months
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the costs in euros that would have been saved by multiplying the amount of high confidence predicted diminutive and small polyps with the histopathology costs per lesion
Prazo: 18 months
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18 months
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: Evelien Dekker, Prof. dr., e.dekker@amc.uva.nl
Publicações e links úteis
Publicações Gerais
- Ignjatovic A, East JE, Suzuki N, Vance M, Guenther T, Saunders BP. Optical diagnosis of small colorectal polyps at routine colonoscopy (Detect InSpect ChAracterise Resect and Discard; DISCARD trial): a prospective cohort study. Lancet Oncol. 2009 Dec;10(12):1171-8. doi: 10.1016/S1470-2045(09)70329-8. Epub 2009 Nov 10.
- Rex DK, Kahi C, O'Brien M, Levin TR, Pohl H, Rastogi A, Burgart L, Imperiale T, Ladabaum U, Cohen J, Lieberman DA. The American Society for Gastrointestinal Endoscopy PIVI (Preservation and Incorporation of Valuable Endoscopic Innovations) on real-time endoscopic assessment of the histology of diminutive colorectal polyps. Gastrointest Endosc. 2011 Mar;73(3):419-22. doi: 10.1016/j.gie.2011.01.023.
- Kaminski MF, Hassan C, Bisschops R, Pohl J, Pellise M, Dekker E, Ignjatovic-Wilson A, Hoffman A, Longcroft-Wheaton G, Heresbach D, Dumonceau JM, East JE. Advanced imaging for detection and differentiation of colorectal neoplasia: European Society of Gastrointestinal Endoscopy (ESGE) Guideline. Endoscopy. 2014 May;46(5):435-49. doi: 10.1055/s-0034-1365348. Epub 2014 Mar 17.
- Hazewinkel Y, Lopez-Ceron M, East JE, Rastogi A, Pellise M, Nakajima T, van Eeden S, Tytgat KM, Fockens P, Dekker E. Endoscopic features of sessile serrated adenomas: validation by international experts using high-resolution white-light endoscopy and narrow-band imaging. Gastrointest Endosc. 2013 Jun;77(6):916-24. doi: 10.1016/j.gie.2012.12.018. Epub 2013 Feb 21.
- Kuiper T, Marsman WA, Jansen JM, van Soest EJ, Haan YC, Bakker GJ, Fockens P, Dekker E. Accuracy for optical diagnosis of small colorectal polyps in nonacademic settings. Clin Gastroenterol Hepatol. 2012 Sep;10(9):1016-20; quiz e79. doi: 10.1016/j.cgh.2012.05.004. Epub 2012 May 18.
- Wanders LK, East JE, Uitentuis SE, Leeflang MM, Dekker E. Diagnostic performance of narrowed spectrum endoscopy, autofluorescence imaging, and confocal laser endomicroscopy for optical diagnosis of colonic polyps: a meta-analysis. Lancet Oncol. 2013 Dec;14(13):1337-47. doi: 10.1016/S1470-2045(13)70509-6. Epub 2013 Nov 13.
- Kaltenbach T, Rex DK, Wilson A, Hewett DG, Sanduleanu S, Rastogi A, Wallace M, Soetikno R. Implementation of optical diagnosis for colorectal polyps: standardization of studies is needed. Clin Gastroenterol Hepatol. 2015 Jan;13(1):6-10.e1. doi: 10.1016/j.cgh.2014.10.009. No abstract available.
- Kumar S, Fioritto A, Mitani A, Desai M, Gunaratnam N, Ladabaum U. Optical biopsy of sessile serrated adenomas: do these lesions resemble hyperplastic polyps under narrow-band imaging? Gastrointest Endosc. 2013 Dec;78(6):902-909. doi: 10.1016/j.gie.2013.06.004. Epub 2013 Jul 9.
- Vleugels JLA, Hazewinkel Y, Dijkgraaf MGW, Koens L, Fockens P, Dekker E; DISCOUNT study group. Optical diagnosis expanded to small polyps: post-hoc analysis of diagnostic performance in a prospective multicenter study. Endoscopy. 2019 Mar;51(3):244-252. doi: 10.1055/a-0759-1605. Epub 2018 Dec 13.
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Início do estudo
Conclusão Primária (Real)
Conclusão Primária
Conclusão do estudo (Real)
Conclusão do estudo
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Primeira postagem
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última Atualização Postada
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
Outros números de identificação do estudo
- W14_099
- NTR4635 (Identificador de registro: The Netherlands National Trial Register)
- FP 13 (Número de outro subsídio/financiamento: Dutch Digestive Foundation)
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