A Multicenter, Randomized, Double-blind, Placebo-controlled Phase III Study to Evaluate the Efficacy and Safety of Omalizumab in Patients With Chronic Spontaneous Urticaria (CSU) Who Remain Symptomatic Despite H1 Antihistamine Therapy

This was a Phase III, multicenter, randomized, double-blind, placebo-controlled, parallel-group study to evaluate the efficacy and safety of omalizumab administered subcutaneously as an add-on therapy for the treatment of adolescent and adult participants 12 - 75 years who received the diagnosis of refractory chronic spontaneous uriticaria and who remained symptomatic despite standard-dosed non-sedating H1 antihistamine treatment.