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Lovell, Daniel J.; Johnson, Anne L.; Huang, Bin; Gottlieb, Beth S.; Morris, Paula W.; Kimura, Yukiko; Onel, Karen; Li, Suzanne C.; Grom, Alexei A.; Taylor, Janalee; Brunner, Hermine I.; Huggins, Jennifer L.; Nocton, James J.; Haines, Kathleen A.; Edelheit, Barbara S.; Shishov, Michael; Jung, Lawrence K.; Williams, Calvin B.; Tesher, Melissa S.; Costanzo, Denise M.; Zemel, Lawrence S.; Dare, Jason A.; Passo, Murray H.; Ede, Kaleo C.; Olson, Judyann C.; Cassidy, Elaine A.; Griffin, Thomas A.; Wagner‐Weiner, Linda; Weiss, Jennifer E.; Vogler, Larry B.; Rouster‐Stevens, Kelly A.; Beukelman, Timothy; Cron, Randy Q.; Kietz, Daniel; Schikler, Kenneth; Schmidt, Kara M.; Mehta, Jay; Wahezi, Dawn M.; Ting, Tracy V.; Verbsky, James W.; Eberhard, B. Anne; Spalding, Steven; Chen, Chen; Giannini, Edward H.
Arthritis & rheumatology, September 2018, 2018-09-00, 20180901, Volume: 70, Issue: 9Journal Article
Objective To determine the frequency, time to flare, and predictors of disease flare upon withdrawal of anti–tumor necrosis factor (anti‐TNF) therapy in children with polyarticular forms of juvenile idiopathic arthritis (JIA) who demonstrated ≥6 months of continuous clinically inactive disease. Methods In 16 centers 137 patients with clinically inactive JIA who were receiving anti‐TNF therapy (42% of whom were also receiving methotrexate MTX) were prospectively followed up. If the disease remained clinically inactive for the initial 6 months of the study, anti‐TNF was stopped and patients were assessed for flare at 1, 2, 3, 4, 6, and 8 months. Life‐table analysis, t‐tests, chi‐square test, and Cox regression analysis were used to identify independent variables that could significantly predict flare by 8 months or time to flare. Results Of 137 patients, 106 (77%) maintained clinically inactive disease while receiving anti‐TNF therapy for the initial 6 months and were included in the phase of the study in which anti‐TNF therapy was stopped. Stopping anti‐TNF resulted in disease flare in 39 (37%) of 106 patients by 8 months. The mean/median ± SEM time to flare was 212/250 ± 9.77 days. Patients with shorter disease duration at enrollment, older age at onset and diagnosis, shorter disease duration prior to experiencing clinically inactive disease, and shorter time from onset of clinically inactive disease to enrollment were found to have significantly lower hazard ratios for likelihood of flare by 8 months (P < 0.05). Conclusion Over one‐third of patients with polyarticular JIA with sustained clinically inactive disease will experience a flare by 8 months after discontinuation of anti‐TNF therapy. Several predictors of lower likelihood of flare were identified.
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