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Repici A, Spada C, Cannizzaro R, Traina M, Maselli R, Maiero S, Galtieri A, Guarnieri G, Di Leo M, Lorenzetti R, Capogreco A, Spadaccini M, Antonelli G, Zullo A, Amata M, Ferrara E, Correale L, Granata A, Cesaro P, Radaelli F, Minelli Grazioli L, Anderloni A, Fugazza A, Finati E, Pellegatta G, Carrara S, Occhipinti P, Buda A, Fuccio L, Manno M, Hassan C. Novel 1-L polyethylene glycol + ascorbate versus high-volume polyethylene glycol regimen for colonoscopy cleansing: a multicenter, randomized, phase IV study. Gastrointest Endosc 2021; 94:823-831.e9. [PMID: 33940043 DOI: 10.1016/j.gie.2021.04.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 04/18/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Adequate bowel cleansing is critical to ensure quality and safety of a colonoscopy. A novel 1-L polyethylene glycol plus ascorbate (1L-PEG+ASC) regimen was previously validated against low-volume regimens but was never compared with high-volume regimens. METHODS In a phase IV study, patients undergoing colonoscopy were randomized 1:1 to receive split-dose 1L PEG+ASC or a split-dose 4-L PEG-based regimen (4L-PEG) in 5 Italian centers. Preparation was assessed with the Boston Bowel Preparation Scale (BBPS) by local endoscopists and centralized reading, both blinded to the randomization arm. The primary endpoint was noninferiority of 1L-PEG+ASC in colon cleansing. Secondary endpoints were superiority of 1L-PEG+ASC, patient compliance, segmental colon cleansing, adenoma detection rate, tolerability, and safety. RESULTS Three hundred eighty-eight patients (median age, 59.8 years) were randomized between January 2019 and October 2019: 195 to 1L-PEG+ASC and 193 to 4L-PEG. Noninferiority of 1L-PEG+ASC was demonstrated for cleansing in both the entire colon (BBPS ≥ 6: 97.9% vs 93%; relative risk [RR], 1.03; 95% confidence interval [CI], 1.001-1.04; P superiority = .027) and in the right-sided colon segment (98.4% vs 96.0%; RR, 1.02; 95% CI, .99-1.02; P noninferiority = .013). Compliance was higher with 1L-PEG+ASC than with 4L-PEG (178/192 [92.7%] vs 154/190 patients [81.1%]; RR, 1.10; 95% CI, 1.05-1.12), whereas no difference was found regarding safety (moderate/severe side effects: 20.8% vs 25.8%; P = .253). No difference in adenoma detection rate (38.8% vs 43.0%) was found. CONCLUSIONS One-liter PEG+ASC showed noninferiority compared with 4L-PEG in achieving adequate colon cleansing and provided a higher patient compliance. No differences in tolerability and safety were detected. (Clinical trial registration number: NCT03742232.).
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Affiliation(s)
- Alessandro Repici
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Cristiano Spada
- Digestive Endoscopy Unit and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy; Digestive Endoscopy Unit, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Renato Cannizzaro
- UO Oncological Gastroenterology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Mario Traina
- Endoscopy Service, Department of Diagnostic and Therapeutic Services, Istituto ISMETT, Palermo, Italy
| | - Roberta Maselli
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Stefania Maiero
- UO Oncological Gastroenterology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Alessia Galtieri
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Giovanni Guarnieri
- UO Oncological Gastroenterology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy
| | - Milena Di Leo
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | | | - Antonio Capogreco
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Marco Spadaccini
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Giulio Antonelli
- Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy
| | - Angelo Zullo
- Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy
| | - Michele Amata
- Endoscopy Service, Department of Diagnostic and Therapeutic Services, Istituto ISMETT, Palermo, Italy
| | - Elisa Ferrara
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | | | - Antonino Granata
- Endoscopy Service, Department of Diagnostic and Therapeutic Services, Istituto ISMETT, Palermo, Italy
| | - Paola Cesaro
- Digestive Endoscopy Unit and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy
| | | | | | - Andrea Anderloni
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Alessandro Fugazza
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Elena Finati
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Gaia Pellegatta
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Silvia Carrara
- Endoscopy Unit, Humanitas Clinical and Research Center, IRCCS, Milan, Italy
| | - Pietro Occhipinti
- Department of Gastroenterology, "Maggiore Della Carità" Hospital, Novara, Italy
| | - Andrea Buda
- Gastroenterology Unit, Santa Maria del Prato Hospital, Feltre, Italy
| | - Lorenzo Fuccio
- Gastroenterology Unit, Department of Medical and Surgical Sciences, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Mauro Manno
- Digestive Endoscopy Unit, Carpi-Mirandola Hospitals, Azienda USL Modena
| | - Cesare Hassan
- Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy
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