PROSINUS is an prospective, observational, epidemiological study of health outcome in which the exposure factor is not a medicine but a disease. “it is not drug efficacy and/or tolerance that is being assessed but the evolution of a disease from initial diagnosis to final cure.” Before the first visit, information was obtained on the treatment received by the patient in the non-ENT primary care system, while the management approach applied during specialist care was examined after the first visit.

The study’s primary goal is to assess the diagnostic, treatment and clinical monitoring procedures available for acute rhinosinusitis in usual practice. The secondary goals include the following: describe the bio-demographic and clinical profile of the patient with acute rhinosinusitis, assess the degree to which the European position papers (EP3OS) are applied in the Spanish health system, determine the prevalence of complications of acute rhinosinusitis, analyse the health-related quality of life of patients with acute rhinosinusitis, and assess their treatment compliance.

Certain pharmacoeconomic goals have also been set: study the socioeconomic impact of acute rhinosinusitis, evaluating the ratio-optimization of the resources used to control the disease, and the impact on work life.

The primary study variables are: disease duration, diagnostic resources used or number of visits; the secondary variables are concerned with epidemiological data, treatment compliance (Morisky-Green test), and degree of satisfaction.