Ab0902 Rates of Remission in Patients With Axial Spondyloarthritis Treated in Tertiary Care

Background: Achieving remission is the treatment target for patients (pts.) with axial spondyloarthritis (axSpA). Remission rates over longer periods in a real-life setting have not been studied so far. Objectives: To evaluate the remission rates in a cohort of axSpA pts. treated in a tertiary care center using retrospective and prospective data. Methods: Adult pts. with a diagnosis of axSpA were eligible for inclusion when ≥ 2 consecutive Ankylosing Spondylitis Disease Activity Score (ASDAS) assessments were documented in the hospital information system in the past. At the next clinical visit, patients and disease characteristics as well as standard assessments using validated outcome parameters for disease activity ASDAS, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) and physical function via Bath Ankylosing Spondylitis Functional Index (BASFI) were then prospectively documented. Values of BASDAI, ASDAS and BASFI were taken retrospectively from the hospital information system. ASDAS was calculated either by ASDAS-CRP or alternative-ASDAS the latter one, when patient global assessment was unavailable. 1 Remission was defined as an ASDAS Results: A total of 200 pts. were consecutively examined at their clinical visit between March and September 2022. Retrospective chart data were available over a period of 82.6 (58.6) months. Mean age at clinical visit was 46.3 (13.3). 71 (35.5) pts. were female. 154 (80.2%) pts. were HLA-B27 positive. 156 (78%) pts. took b- or tsDMARDS, 105 (52.5) pts. additionally needed NSAIDs on-demand. The time since pts. first had symptoms was 19.8 (12.9) years ago. Mean Pain (NRS 0-10) at clinical visit was 3.9 (2.6). Mean ASDAS at the clinical visit was 2.0 (1.0) and 52 pts. (26.0%) were in ASDAS remission. 74 (37.0%) pts. showed limitations in physical functioning (BASFI >4) (Table 1). 117 pts. (58.5%) achieved ASDAS remission at least once. On average, remission was reached 37.7 (44.5) months after the index visit. 44 pts. achieved remission within the first year (37.6%), 20 in the second (17.1%), 13 in the third (11.1%) and 40 patients (34.2%) after 3 years Figure 1). 9 (7.7%) pts. achieved their first ASDAS remission at the clinical visit. During the observation period pts. achieved remission for 9.9 (16.8) months or 21.6% (29.9%) of the time, while 51 pts. (43.6%) achieved sustained remission for at least 6 consecutive months, 31 pts. (26.5%) achieved sustained remission for at least 12 consecutive months. 83 pts. (41.5%) never achieved ASDAS remission. In a multivariable model, high CRP (OR=1.35, 95% CI 1.10 to 1.73) and low BASDAI (OR=0.72, 95% CI 0.53 to 0.97) at index visit were associated with higher odds of achieving remission at least once (both pConclusion: Achievement of remission is an attainable goal for patients with axSpA. High CRP and low BASDAI at index visit were shown to be predictors of ASDAS remission. The majority of patients achieved remission within the first two years after the initial visit. However, also after the fifth year of follow up a quarter of patients achieved ASDAS remission for the first time. REFERENCES: 1 Ortolan A et al. Rheumatology 2020 Table 1. Acknowledgements: The project was in part funded by Novartis. Disclosure of Interests: Franziska Elena Neinert: None declared, Abin Puravath: None declared, Imke Redeker: None declared, Styliani Tsiami: None declared, David Kiefer Abbvie, BMS, Roche, Chugai, Novartis, UCB, Sanofi, MSD, Merck, GSK, Janssen, Boehringer Ingelheim, Galapagos, Abbvie, BMS, Roche, Chugai, Novartis, UCB, Sanofi, MSD, Merck, GSK, Janssen, Boehringer Ingelheim, Galapagos, Abbvie, Novartis, Xenofon Baraliakos Abbvie, Amgen, Chugai, Galapagos, Lilly, MSD, Novartis, Pfizer, UCB, Sandoz, AbbVie, Amgen, Chugai, Galapagos, Lilly, MSD, Novartis, Pfizer, UCB, Sandoz, AbbVie, Amgen, Chugai, Galapagos, Lilly, MSD, Novartis, Pfizer, UCB, Sandoz, Uta Kiltz AbbVie, Amgen, Eli Lilly, Fresenius, Hexal, Janssen, Novartis, UCB, AbbVie, Amgen, Eli Lilly, Fresenius, Hexal, Janssen, Novartis, UCB, AbbVie, Amgen, Fresenius, GSK, Hexal, Janssen, Novartis, UCB.