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Data on the clinical burden of chronic spontaneous urticaria (CSU) and economic consequences are lacking in France. To characterize the clinical and economic burden of CSU in symptomatic patients despite treatment by analysing data of French patients from the ASSURE-CSU study. ASSURE-CSU was an international observational study that included CSU patients with symptoms that lasted for 12 months or more despite treatment. Disease characteristics and healthcare resource use were obtained from medical records. Data on disease history, health-related quality of life (HR-QoL), and work productivity were collected from a patient survey. A total of 101 patients were analysed (76.2% female; mean age: 48.9 years) with moderate to severe disease (UAS7 score ≥16) in 43.4% and angioedema in 72.3%. The mean (S.D.) total scores of Chronic Urticaria Quality of Life (CU-Q 2 oL) and Dermatology Life Quality Index (DLQI) were 37.7 (22.3) and 9.7 (6.9), respectively, thus indicating a significant impact of the disease on HR-QoL. Mean absenteeism and presenteeism were 6.4% and 20.8%, respectively, with a mean loss of work productivity estimated at 20.7%. The mean (S.D.) total direct cost of CSU was €2,397 per patient per year and was mainly driven by therapies (€1,435) and inpatient costs (€859). The indirect costs for four weeks were mainly presenteeism (€421) and loss of work productivity (€420). CSU significantly impairs HR-QoL, which increases with the severity of the disease. The direct and indirect costs for the management of symptomatic CSU are an important economic burden.

Chronic spontaneous urticaria (CSU) is a skin disease characterised by wheal appearance, swelling, itching, and painful skin. Omalizumab has been used for CSU treatment demonstrating good efficacy. To investigate the efficacy and safety of omalizumab treatment in CSU patients in real-life practice. A retrospective analysis was performed on 38 patients suffering from CSU who received 300 mg of omalizumab every four weeks. After omalizumab treatment, 68.4% of patients showed a complete response (UAS7 = 0). All the patients were able to stop treatment with corticosteroids, cyclosporine, and anti-leukotrienes, and only 39.5% of patients remained on anti-histamines. Omalizumab treatment led to a 96% and 65% decrease in emergency room and primary health care visits, respectively, as well as a reduction in the direct costs associated with the disease. No omalizumab-related adverse events were reported. Omalizumab exhibits good efficacy in alleviating the symptoms of CSU, leads to a decrease in concomitant medication use, restores patients' quality of life, and has economic benefits by reducing disease-related health care costs.