AB0144 PREDICTIVE FACTORS OF SUSTAINED CLINICAL REMISSION IN RHEUMATOID ARTHRITIS
Authors: R. Fakhfakh, N. El Amri, K. Baccouche, H. Zeglaoui, E. Bouajina
Journal: Annals of the Rheumatic Diseases (2021)

Background: Sustained remission (SR) is an ultimate treatment goal in the management of patients with rheumatoid arthritis (RA) (1) and is associated with better RA prognosis, reflected by the quality of life, physical function and radiographic progression (2). Objectives: To investigate the prevalence and predictors of SR in RA patients. Methods: A longitudinal prospective study of patients with RA. At the inclusion, the patients were in remission DAS28 ESR≤ 2.6 for at least 6 months. A B-mode and power doppler (PD) ultrasound of 42 joints and 20 tendons was performed. Synovial hypertrophy (SH) and tenosynovitis in B-mode and PD were defined and scored from 0 to 3 using the OMERACT. The CDAI, SDAI, Boolean remission criteria, the health assessment questionnaire (HAQ) and the radiological Sharp score were calculated. Then, the DAS28 erythrocyte sedimentation rate (ESR) was evaluated at 6 and 12 months. SR was defined as the persistence of a DAS28 ESR ≤2.6 at 6 or 12 months without any change in RA therapy during the follow-up. Unstable remission (UR) was defined either as DAS28 ESR &gt; 2.6 at 6 or 12 months or an increase in RA therapy because of a relapse during the follow-up. Results: At baseline, thirty-seven patients were included. At 6 and 12 months, 28 and 24 patients completed follow-up, respectively. In decreasing order, Boolean remission (92.2%), DAS28 ESR remission (85.7%), SDAI remission (85%) and CDAI remission (83.3%) achieved SR at 6 months. At 12 months, SR was found in 100% in Boolean remission, 87.5% in SDAI remission, 86.7% in CDAI remission and in 79.7% in DAS28 ESR remission. At 6 months, only the ESR (17mm/1h in SR versus 32 mm/1h in UR, p=0.04) was associated with SR. The disease duration, remission duration, swollen and tender joints, DAS28 ESR , HAQ, rheumatoid factor, radiological Sharp score and ultrasound parameters weren’t associated with SR. At 12 months, the squeeze test (15% in SR vs 80% in UR, P=0.01), the ESR (15 mm/1h in SR versus 30 mm/1h in UR, p=0.03), the Boolean remission (61.1% in SR versus 0% in UR, p=0.04) and the DAS28 ESR (mean: 1.8 in SR versus 2.5 in UR, P=0.01) were associated with SR. However, no association was found with radiological Sharp score and ultrasound parameters. On multivariate analysis, the ESR (OR=1.13, CI95%=1.01-1.2, p=0.03) and the Squeeze test (OR=21.3, CI95%=1.7-263, p=0.01) were predictors of SR, at 12 months. Conclusion: At 6 and 12 months, 79.7%-85.7% of patients in DAS28 ESR remission achieved sustained remission, respectively. Boolean and DAS28 ESR remission were associated with SR. Unlike DAS28 ESR, Boolean remission seems to reflect more the SR. The squeeze test and the ESR were predictors’ factor. However, the radiological and the ultrasound parameters didn’t show any association. References: [1]Ajeganova S, Huizinga T. Sustained remission in rheumatoid arthritis: latest evidence and clinical considerations. Ther Adv Musculoskelet Dis. 2017;9(10):249-62. [2]Xie W, Li J, Zhang X, Sun X, Zhang Z. Sustained clinical remission of rheumatoid arthritis and its predictive factors in an unselected adult Chinese population from 2009 to 2018. Int J Rheum Dis. 2019;22(9):1670-8. Disclosure of Interests: None declared