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- W4220761191 abstract "Abstract Aims: 1) To delineate latent classes of treatment response to biologics in juvenile idiopathic arthritis (JIA) patients in the first 16 weeks after initiation. 2) To identify predictors of early disease response. Methods: The study population was drawn from four biologics trials in polyarticular course JIA: Etanercept 2000, Abatacept 2008, TRial of Early Aggressive Therapy (TREAT) 2012 and Tocilizumab 2014. The outcome was active joint counts (AJC). Semiparametric latent class trajectory analysis was applied to identify latent classes of response to treatment; AJC was transformed for this modelling. We tested baseline disease and treatment characteristics for their abilities to predict class membership of response. Results: There were 480 participants, 74% females. At baseline, 26% were rheumatoid factor positive. 67% were on methotrexate at enrollment. Three latent class solution provided the best fit. Baseline AJC was the sole best predictor of class membership. Participants classified by their highest membership probabilities into high baseline AJC (>30) and slow response (26.5%), low baseline AJC (<10), early and sustained response (29.7%), and moderate baseline AJC progressive response (43.8%). Participants were classified into the latent classes with a mean class membership posterior probability 0f 0.97. Those on methotrexate at baseline were less likely to belong to high baseline AJC class. Conclusions: Three latent classes of responses were detectable in the first 16 weeks of biologics therapy. Those with the highest baseline AJC demonstrated very slow response in this window and were less likely to be on concomitant methotrexate. Trials Registration: TREAT 2012 (NCT NCT00443430)(1), tocilizumab trial 2014 ( NCT00988221 ), abatacept trial 2008 (NCT00095173). Etanercept 2000 from Amgen does not have a trial registration number." @default.
- W4220761191 created "2022-04-03" @default.
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- W4220761191 date "2022-03-07" @default.
- W4220761191 modified "2023-09-27" @default.
- W4220761191 title "Latent Classes of Early Response Trajectories to Biologics Initiation in Juvenile Idiopathic Arthritis: An Analysis of Four Trials" @default.
- W4220761191 doi "https://doi.org/10.21203/rs.3.rs-1413607/v1" @default.
- W4220761191 hasPublicationYear "2022" @default.
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