The Open Rheumatology Journal

ISSN: 1874-3129 ― Volume 15, 2021

Celecoxib and Diclofenac Plus Omeprazole are Similarly Effective in the Treatment of Arthritis in Patients at High GI Risk in the CONDOR Trial§

Herbert L. Kellner*, 1, Chunming Li2, Margaret N. Essex2
1 Division of Rheumatology, Center for Inflammatory Joint Diseases, Munich, Germany
2 Pfizer Inc, New York, NY, USA



Compare effectiveness of celecoxib versus diclofenac plus omeprazole in improving arthritis signs and symptoms in patients at high gastrointestinal (GI) risk who were enrolled in the CONDOR (Celecoxib vs Omeprazole and Diclofenac in Patients With Osteoarthritis and Rheumatoid Arthritis) trial.


CONDOR was a 6-month, prospective, double-blind, triple-dummy, parallel-group, randomized, multicenter trial comparing celecoxib 200 mg twice daily versus diclofenac slow release (SR) 75 mg twice daily plus omeprazole 20 mg daily. Patients were Helicobacter pylori negative, had osteoarthritis (OA) or rheumatoid arthritis (RA), were aged ≥60 years, were with or without a history of gastroduodenal ulceration, or were ≥18 years with previous gastroduodenal ulceration. Patients’ Global Assessment of Arthritis was determined at each study visit.


A total of 4484 patients were randomized to treatment (2238 celecoxib, 2246 diclofenac SR) and included in the intention-to-treat analyses. Least squares mean (LSM) (standard error [SE]) for Patients’ Global Assessment of Arthritis was 3.219 (0.017) and 3.221 (0.017) at baseline for celecoxib and diclofenac SR (p=0.90). Improvement in both groups was similar in months 2, 4, and 6; at month 1 the LSM (SE) was 2.647 (0.017) and 2.586 (0.017) for celecoxib and diclofenac (p=0.0025). LSM difference (SE) from baseline to final visit demonstrated an improvement of 0.75 (0.02) in celecoxib-treated patients and 0.77 (0.02) in diclofenac SR-treated patients (p=0.42).


Celecoxib and diclofenac plus omeprazole were shown to have similar efficacy in patients with OA and/or RA at increased GI risk who were enrolled in the CONDOR trial.

Trial Registry:

Trial was registered under identifier NCT00141102.

Keywords: : Arthritis, GI, NSAIDs..

Article Information

Identifiers and Pagination:

Year: 2013
Volume: 7
First Page: 96
Last Page: 100
Publisher Id: TORJ-7-96
DOI: 10.2174/1874312901307010096

Article History:

Received Date: 19/3/2013
Revision Received Date: 9/9/2013
Acceptance Date: 14/9/2013
Electronic publication date: 13/11/2013
Collection year: 2013

© Kellner et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Division of Rheumatology, Center for Inflammatory Joint Diseases, KH Neuwittelsbach, Romanstr. 9, 80639 München, Germany; Tel: 089 / 13 959-100; Fax: 089 / 13 959-102; E-mail:§ These data were presented at the European League Against Rheumatism annual congress, London, UK, 27 May 2011. Abstract No. FRI0125. Ann Rheum Dis 2011; 70(suppl 3): 386.

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