Predicting responses to omalizumab in antihistamine-refractory chronic urticaria: A real-world longitudinal study

Autor: Hyun-Young Lee, PhD, Hyun-Seob Jeon, MD, Jae-Hyuk Jang, MD, Youngsoo Lee, MD, Yoo Seob Shin, MD, PhD, Dong-Ho Nahm, MD, PhD, Hae-Sim Park, MD, PhD, Young-Min Ye, MD, PhD
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of Allergy and Clinical Immunology: Global, Vol 3, Iss 2, Pp 100245- (2024)
Druh dokumentu: article
ISSN: 2772-8293
DOI: 10.1016/j.jacig.2024.100245
Popis: Background: Treating chronic urticaria (CU) that is unresponsive to H1-antihistamines (H1AHs) is challenging, and the real-world effectiveness of omalizumab remains unclear. Objective: Our aim was to evaluate the real-world effectiveness of omalizumab, optimal response assessment timing, and predictive factors. Methods: Initially, 5535 patients with CU who were receiving at least 20 mg of loratadine daily for at least 6 months (January 2007-August 2021) were screened. Ultimately, 386 patients who had been receiving omalizumab add-on treatment for >6 months were followed-up for more than 2 years. Predictors of treatment response to omalizumab add-on therapy for patients with antihistamine-refractory CU were identified by using a generalized linear model. Results: In our retrospective cohort, omalizumab treatment showed cumulative response rates of 55.2% at 3 months, 71.0% at 6 months, and 81.4% at 9 months for patients with H1AH-refractory CU. Analysis of longitudinal responses to omalizumab treatment revealed 3 distinct clusters: favorable (cluster 1 [n = 158]), intermediate (cluster 2 [n =1 43]), and poor responses (cluster 3 [n = 85]). Subjects were categorized on the basis of whether they had achieved a complete response within 3 months; 213 early responders, 117 late responders, and 56 nonresponders were identified. The initial dose of omalizumab differed significantly among the 3 clusters. Low total IgE level (
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