Eligible patients were aged ≥12 years with moderate or severe PER (ie, symptoms >4 days/week for >4 consecutive weeks) and were prescribed MP-AzeFlu (one spray/nostril twice a day; daily doses: azelastine hydrochloride 548 μg; fluticasone propionate 200 μg) according to the summary of product characteristics.6 AR diagnosis was verified by local standard practice (eg, skin prick test or serum immunoglobulin E measures) as in the real-world clinical practice. The decision to include a patient in the study was made independently from and after the decision to prescribe MP-AzeFlu nasal spray. Treatment for at least 6 weeks was considered necessary. All patients (and caregivers, for those aged <18 years) were required to provide written informed consent prior to participation in the study.