Publications

Los Angeles Classification

Wang D, Dadgar K, Yuan Y, Sinclair P, Sharma P, Vaezi M, Armstrong D. Interobserver agreement for the assessment of erosive reflux esophagitis: a post hoc analysis of clinical trial data. Dis Esophagus. 2026 Jan 9;39(1):doaf133.
Dadgar K, Wang D, Yuan Y, Sinclair P, Sharma P, Armstrong D. Training and Assessment of Clinician’s Utilization of the Los Angeles Classification for Reflux Esophagitis. Foregut. 2024;0(0). doi:10.1177/26345161241269002
Dent J. Endoscopic grading of reflux oesophagitis: The past, present and future. Best Practice & Research Clinical Gastroenterology, Volume 22, Issue 4, August 2008, Pages 585-599 Purchase from Science Direct
Lundell LR, Dent J, Bennett JR, Blum AL, Armstrong D, Galmiche JP, Johnson F, Hongo M, Richter JE, Spechler SJ, Tytgat GN, Wallin L. Endoscopic assessment of oesophagitis: clinical and functional correlates and further validation of the Los Angeles classification . Gut. 1999 Aug;45(2):172-80.
Armstrong D, Bennett JR, Blum AL, Dent J, De Dombal FT, Galmiche JP, Lundell L, Margulies M, Richter JE, Spechler SJ, et al. The endoscopic assessment of esophagitis: a progress report on observer agreement . Gastroenterology. 1996 Jul;111(1):85

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Los Angeles Classification: Development, validation and accumulated experience » 7 developmentvalidationandaccumulatedexperience.ppt File Options Download Goto Post Share

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LA Classification Poster » 8 la classification poster.png File Options Download Goto Post Share

Fiocca R, Mastracci L, Riddell R et al. Development and validation of criteria for the recognition of histological lesions in patients with GERD. Gut 2008;57(Suppl 2):A37.
Fiocca R, Riddell RH, Takubo K et al. Microscopic esophagitis: interobserver consistency using consensus-based criteria. Gut 2007;56 (Suppl 3):A75 (OP-G-331).
Edebo A, Tam W, Bruno M et al. Magnification endoscopy for diagnosis of nonerosive reflux disease: a proposal of diagnostic criteria and critical analysis of observer variability. Endoscopy 2007;39:195?201. Purchase from National Center for Biotechnology Information
Jankowski J, Barr H. Improving surveillance for Barrett’s oesophagus: AspECT and BOSS trials provide an evidence base. BMJ 2006;332:1512. See pages 1, 2, and 5.
Sharma P, Dent J, Armstrong D, Bergman J, Gossner L, Hoshihara Y, Jankowski J, Junghard O, Lundell L, Tytgat G, Vieth M. The development and validation of an endoscopic grading system for Barrett’s oesophagus – the Prague C and M criteria. Gastroenterology 2006;131:1392-1399.

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Validation Study » 10 validationstudy.ppt File Options Download Goto Post Share
Development and description of new criteria for the endoscopic diagnosis and grading of Barrett’s Esophagus » 9 developmentanddescriptionofnewcriteria.ppt File Options Download Goto Post Share

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Prague Criteria Poster » 11 prague_criteria_poster.jpg File Options Download Goto Post Share

Srinivasan S, Srinivasan P, Sinclair P, Kennedy K, Falk G, Armstrong D, Sharma P. Seeking gastroenterological services during a pandemic: lessons from a large, national, population-based survey during the COVID-19 pandemic Open Access. 2026 Journalof the Canadian Association of Gastroenterology, 2026,00, 1–5

- Armstrong D, Srinivasan S, Rooker C, Sinclair P, Taylor E, Sharma P. Symptom Profile, Proton Pump Inhibitor Therapy, and Diagnostic Testing in Patients With Persistent Reflux-Like Symptoms: Results From a Population-Based Survey. Foregut. 2023;0(0). doi:10.1177/26345161231173643
- Armstrong D, Hungin AP, Kahrilas PJ, Sifrim D, Sinclair P, Vaezi MF, and Sharma P. Knowledge gaps in the management of refractory reflux-like symptoms: Healthcare provider survey. Neurogastroenterol & Motil.2022;00:e14387.
- David Armstrong, A. Pali Hungin, Peter J. Kahrilas et al. Management of Patients With Refractory Reflux-Like Symptoms Despite Proton Pump Inhibitor Therapy: Evidence-Based Consensus Statements. Aliment Pharmacol Ther. 30 December 2024.

Bergman JJGHM, de Groof AJ, Pech O, Ragunath K, Armstrong D, Mostafavi N, Lundell L, Dent J, Vieth M, Tytgat GN, Sharma P; International Working Group for Classification of Oesophagitis. An Interactive Web-Based Educational Tool Improves Detection and Delineation of Barrett’s Esophagus-Related Neoplasia. Gastroenterology. 2019 Apr;156(5):1299-1308.