Ertas R, et al. - In a study population comprising patients with chronic spontaneous urticaria (CSU), researchers investigated whether response rates to omalizumab therapy are linked to their baseline IgE levels, their IgE levels after omalizumab treatment, and the ratio of on treatment IgE and baseline IgE levels. Researchers observed that response to omalizumab was predicted by total IgE levels and their change and hence, evaluation of pre- and post-treatment IgE levels may assist to improve the management of CSU in patients who require omalizumab treatment.