A Novel Clinical Decision Support Tool to Predict Submucosal Invasive Cancer Within Large Non-Pedunculated Colorectal Polyps
Multi-centre Evaluation of a Novel Clinical Decision Support Tool to Predict Submucosal Invasive Cancer Within Large Non-Pedunculated Colorectal Polyps - A Prospective Study
Colorectal cancer can be effectively prevented by removal of pre-malignant polyps during colonoscopy. Large (>=20mm) non-pedunculated colorectal polyps (LNPCPs) require careful assessment before treatment. If submucosal invasive cancer (SMI) is present, it determines whether endoscopic treatment can be curative or whether surgery is needed. Current classification systems to detect SMI are complex, require extensive training, and are underused in non-tertiary hospitals.
A simple web-based clinical decision support tool was created using well-established parameters (presence of a demarcated area, polyp size, Paris classification, location, and granularity) to identify SMI within LNPCPs. Crucially, the tool uses only standard endoscopic imaging available in most endoscopy units.
This prospective multi-centre study evaluates the accuracy of the tool during live endoscopic assessment. Endoscopists of varying experience will assess 10 large colorectal polyps using the tool, then undergo a randomized educational intervention (either a 10-minute instructional video or a 45-minute interactive training session). They will then assess a further 10 polyps using the tool. A third set of 10 assessments at 3 months evaluates durability of learning. Accuracy is compared to expert opinion.
Studieoversigt
Status
Status
Betingelser
Betingelser
Detaljeret beskrivelse
Colorectal cancer (CRC) is a leading cause of death in the Western world. Large non-pedunculated colorectal polyps (LNPCPs, >=20mm) represent 2-3% of colorectal polyps and require special attention. The presence of submucosal invasive cancer (SMI) determines whether endoscopic treatment is curative or whether referral for surgery is necessary. Current endoscopic classification systems (JNET, Kudo, NICE) are complex, require specialized equipment, and extensive training, making them underused in non-tertiary practice.
A novel, freely accessible web-based clinical decision support tool (available at gieqs.com/SMI) was developed based on established risk factors for SMI: the presence and characteristics of a demarcated area within the polyp, polyp size (>=40mm), Paris classification, colonic location, and granularity. The tool uses only standard white-light and virtual chromoendoscopy available in the majority of Western endoscopy units.
This is a prospective, multi-centre study conducted across 8 centres in Belgium, the United Kingdom, Israel, and Italy. The study evaluates whether endoscopists of varying experience can accurately detect SMI within LNPCPs during live colonoscopy using this tool.
The study follows a pre-post design with randomization of the educational intervention:
- Phase 1 (Pre-training): Each endoscopist assesses 10 eligible LNPCPs using a standardized assessment and creates a 1-minute standardized video of each lesion.
- Educational Intervention: Endoscopists are randomly allocated (1:1) to either (a) a 10-minute non-dynamic instructional video or (b) a 45-minute interactive educational session.
- Phase 2 (Post-training): Each endoscopist assesses a further 10 LNPCPs using the clinical decision support tool.
- Phase 3 (Durability): At 3 months, a further 10 assessments are performed to evaluate durability of the training effect.
Expert opinion applied to standardized videos serves as the reference standard. Histopathology results are recorded for all resected specimens. An interim analysis is planned when half the required participants are enrolled.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: David Tate
- Telefonnummer: +3293321063
- E-mail: studiestissue.resectie@uzgent.be
Studiesteder
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Ghent, Belgien, 9000
- Rekruttering
- UZ Gent
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Kontakt:
- David Tate
- Telefonnummer: +3293321063
- E-mail: studiestissue.resectie@uzgent.be
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
Endoscopist participants
- Gastrointestinal endoscopists of varying abilities and grades
- Endoscopists who have not previously encountered the clinical decision support tool Patient participants
- Referred for colonoscopy with appropriate bowel preparation
- Colorectal polyp >=20mm in size detected or referred for resection
- Non-pedunculated morphology
- Non-sessile serrated morphology
- Signed informed consent for the procedure and trial participation
Exclusion Criteria:
Endoscopist participants:
- Does not consent to inclusion
- Does not undergo the learning intervention
- No connection with endoscopy in gastroenterology
Patient participants:
- Does not consent to data collection for the study
- Video of inadequate quality as per opinion of the principal investigator
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Accuracy of Endoscopic Assessment of the Risk of Submucosal Invasive Cancer Within LNPCPs Using the Clinical Decision Support Tool Compared to Expert Opinion During Live Endoscopy
Tidsramme: Through study completion, up to 48 months
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The accuracy of each endoscopist's assessment of SMI risk using the tool, compared to expert opinion applied to a standardised video of the same procedure.
Measured as sensitivity, specificity, and overall accuracy across pre-training, post-training, and 3-month durability phases.
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Through study completion, up to 48 months
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Percentage of LNPCP Assessments in Which a Demarcated Area Is Correctly Detected Using the Clinical Decision Support Tool, Compared to Expert Opinion
Tidsramme: Through study completion, up to 48 months
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Endoscopists assess presence/absence of a demarcated area on a standardised endoscopic video using the SMI clinical decision support tool.
Expert opinion is the reference standard (considered 100% accurate).
Accuracy = proportion of assessments concordant with the expert.
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Through study completion, up to 48 months
|
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Inter-observer Agreement Among Endoscopists in Detection of a Demarcated Area Within LNPCPs, Measured by Fleiss' Kappa
Tidsramme: Through study completion, up to 48 months
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Agreement among the multiple participating endoscopists rating the same standardised endoscopic videos, quantified by Fleiss' kappa (appropriate for 3+ raters; corrects for chance agreement).
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Through study completion, up to 48 months
|
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Percentage of Demarcated Areas in Which the JNET Classification Is Correctly Determined, Compared to Expert Opinion
Tidsramme: Through study completion, up to 48 months
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Endoscopists assign the JNET (Japan NBI Expert Team) classification to the demarcated area within each LNPCP.
Expert opinion is the reference standard (considered 100% accurate).
Accuracy = proportion of assessments in which the endoscopist's JNET category matches the expert reference.
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Through study completion, up to 48 months
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Percentage of Lesions in Which Each Morphological Component (Size, Location, Granularity, Paris Classification) Is Correctly Determined, Compared to Expert Opinion
Tidsramme: Through study completion, up to 48 months
|
Each morphological component is assessed by the endoscopist and compared to the expert reference standard (considered 100% accurate).
Accuracy = proportion of assessments concordant with the expert, reported separately for size, location, granularity, and Paris classification.
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Through study completion, up to 48 months
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Correct Treatment Decision Based Upon the Tool Score (Rate of Unnecessary Surgery for Benign Disease or Unnecessary Endoscopic Treatment Requiring Subsequent Surgery)
Tidsramme: Through study completion, up to 48 months
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Through study completion, up to 48 months
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Endoscopist-Reported Utility of the Clinical Decision Support Tool, Measured by a 5-point Likert-Scale Questionnaire
Tidsramme: Through study completion, up to 48 months
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Participating endoscopists complete a structured questionnaire rating the usability and perceived clinical utility of the tool on a 1-5 Likert scale (1 = not useful, 5 = very useful).
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Through study completion, up to 48 months
|
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Difference in Scoring Accuracy Before and After the Educational Intervention, Comparing a 10-minute Instructional Video Versus a 45-minute Interactive Session
Tidsramme: Through study completion, up to 48 months
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Through study completion, up to 48 months
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Percentage Accuracy of SMI Detection Using the Clinical Decision Support Tool at 3 Months Post-Intervention
Tidsramme: 3 months after educational intervention
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Endoscopists perform a further 10 LNPCP assessments 3 months after the educational intervention, using the SMI clinical decision support tool.
Accuracy = proportion of assessments concordant with the expert reference standard (considered 100% accurate).
Compared to immediately post-intervention accuracy to assess durability of the learning effect.
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3 months after educational intervention
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Neoplasmer efter sted
- Neoplasmer
- Patologiske Tilstande, Anatomiske
- Tarmsygdomme
- Gastrointestinale neoplasmer
- Neoplasmer i fordøjelsessystemet
- Sygdomme i fordøjelsessystemet
- Gastrointestinale sygdomme
- Intestinale neoplasmer
- Endetarmssygdomme
- Tyktarmssygdomme
- Polypper
- Tarmpolypper
- Patologiske tilstande, tegn og symptomer
- Kolorektale neoplasmer
- Colonpolypper
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- ONZ-2022-0256
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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