Abstract
To evaluate the treat-to-target experience, and quality of life measures of moderate and severe rheumatoid arthritis (RA) patients initiating a biologic in a real-world setting of a publicly funded payer system. Biologic naive RA patients who had initiated their first biologic while enrolled in the Ontario Best Practices Research Initiative registry from 2008 to 2020 were selected if they had moderate (DAS28 >3.2 to ≤5.1) or severe (DAS28 >5.1) RA. Remission, LDA, DAS28, HAQ-DI, fatigue, sleep, drug persistence and characteristics associated with remission were assessed at 12 months post biologic initiation. Overall, 838 patients initiated their first biologic, 264 had moderate RA and 219 had severe RA. After 12 months, 44% moderate RA vs. 21% severe RA achieved remission (p<0.0001), and 59% moderate RA vs. 35% severe RA reached LDA (p<0.0001). Mean change (SD) from baseline in DAS28 was 2.2 (1.5) in severe RA vs. 1.4 (1.3) in moderate RA (p<0.0001), in fatigue score was 1.11 (3.2) in severe RA vs. 0.98 (3.2) in moderate RA (p<0.0001). Moderate disease at a biologic initiation was positively associated with remission (p=0.0016). Female gender (p=0.0170), and a higher HAQ-DI score at baseline (p=0.0042) were negatively associated with remission. Biologic persistence was 77% for moderate, and 73% for severe (p=0.2444). Severe RA patients had higher mean score improvements in DAS28, sleep and fatigue. Moderate RA was more likely to reach remission or LDA. Both groups had similar biologic persistence at 12 months. These findings highlight the importance of the treat-to-target approach and its potential underutilisation in the real-world setting.
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