2009 AND 2019-REVISED IWOS CRITERIA FOR OCULAR SARCOIDOSIS. STUDY IN A SERIES OF 384 PATIENTS FROM A SINGLE UNIVERSITY HOSPITAL.

C. Lasa, J. Gaitán Valdizán, L. Sanchez-Bilbao, J. L. Martín-Varillas, D. Martínez-López, I. Gonzalez-Mazon, R. Fernández Ramón, R. Demetrio-Pablo, R. BlancoMarqués de Valdecilla University Hospital, Rheumatology, Santander, Spain Marqués de Valdecilla University Hospital, Ophthalmology, Santander, Spain  Background Sarcoidosis is a systemic inflammatory disorder which involves many organs, including eyes. International Workshop on Ocular Sarcoidosis (IWOS) criteria for diagnosis of ocular sarcoidosis (OS) were first published in 2009 and revised in 2019 (question-based survey and panel discussion) [1-2]. IWOS criteria is a remarkable tool to relate uveitis to sarcoidosis, especially when ocular is the first manifestation in the systemic disease. Due to the consequences of OS, identify and initiate appropriate therapy is essential. Objectives To compare the results of IWOS criteria applied in the same population. Methods We studied a large cohort (n=384) of all consecutive patients diagnosed with sarcoidosis from January 1, 1999, to December 31, 2019. Finally, 344 patients were included according to the ATS/ERS/WASOG criteria [3]. First (2009) and revised (2019) IWOS criteria were applied to patients diagnosed with Sarcoidosis and ocular symptoms and the results were compared in both groups for our population. Concordance between 2009 and 2019 IWOS criteria was evaluated by calculating Cohen´s kappa coefficient. Results 65 (51% men) of 344 patients had ocular involvement (18.9%), mean age 56.7±16.3 years. As for nationality, 92.3% were Spaniard and 7.7% were South American. A positive biopsy for sarcoidosis was obtained in 75.4% (n=49) and a negative biopsy in 6.2% (n=4). There was no statistically significative difference between diagnostic groups for IWOS 2009/IWOS 2019 in age (p=0.738/p=0.495), sex (p=0.534/p=0.459) nor nationality (p=0.529/p=0.393). When applied 2009 IWOS criteria, 60% (39 patients) met any of the diagnostic categories (43.1% Definitive, 13.8% Presumed, 1.5% Probable, 1.5% Possible). When 2019 IWOS criteria was applied, 53.8% (35 patients) met any of the new diagnostic categories (43.1% Definitive, 7.7% Presumed, 3.1% Probable). Sensitivity for IWOS 2009 was 0.6 and for IWOS 2019 was 0.53. There was statistically significative concordance between 2009 and 2019 IWOS criteria (p<0.0001) with a strong consistency level (kappa = 0.824). When analyzing IWOS categories separately, we found total concordance in the Definitive category. Probable and Possible categories in 2009 criteria have been merged in only probable in 2019 criteria and there is a total concordance when comparing both. Presumed category represent the bigger change in the revised criteria. We found statistically significative concordance (p=0.000008) with a moderate consistency level (kappa = 0,524). Conclusion The revised 2019 IWOS criteria is less sensitive in our population; however, the main difference is in the category Presumed: the requirement of at least 2 intraocular signs of uveitis led to a change of 9 patients (13,8%) in 2009 IWOS down to 5 (7.7%) in 2019. In our population IWOS criteria is still has a low sensitivity. References Mochizuki M, Smith et al. Br J Ophthalmol. 2019 Oct;103(10):1418-1422. Sève P, et al. Semin Respir Crit Care Med. 2020 Oct;41(5):673-688. Eur Respir J. 1999;14:735-7). Image/graph:Figure 1. Results of 2009 and 2019 IWOS criteria on a defined population. Acknowledgements: NIL. Disclosure of Interests Carmen Lasa: None declared, Jorge Gaitán Valdizán: None declared, Lara Sanchez-Bilbao: None declared, José Luis Martín-Varillas: None declared, David Martínez-López: None declared, Iñigo Gonzalez-Mazon: None declared, Raúl Fernández Ramón: None declared, Rosalía Demetrio-Pablo: None declared, Ricardo Blanco Speakers bureau: Ricardo Blanco Speakers bureau: Abbvie, Pfizer, Roche, lilly, Bristol-Myers, Janssen, Galapagos and MSD, Consultant of: Abbvie, Pfizer, Roche, lilly, Bristol-Myers, Janssen and MSD, Grant/research support from: Abbvie, MSD, novartis and Roche. Keywords: Uveitis DOI: 10.1136/annrheumdis-2023-eular.5603Citation: , volume 82, supplement 1, year 2023, page 2059Session: Epidemiology, risk factors for disease or disease progression (Publication only)