Based on the evidence for the "common pathway" in asthma presentation, our working hypothesis is that asthma severity and lack of control are related to the prevalence and severity of nasal and sinusal inflammatory pathology, and especially to chronic rhinosinusitis with nasal polyps.

Primary objective: To assess the prevalence and severity of rhinitis and rhinosinusitis, with or without nasal polyposis, in asthmatic patients depending on severity of their disease.

Secondary objectives:

To assess the impact of nasal and sinusal pathology on asthma control.

To correlate asthma severity to rhinitis and rhinosinusitis.

To compare the potential association between chronic rhinosinusitis, with and without nasal polyposis, and asthma severity, and to detect radiographic differences, markers of atopy, and pulmonary function.

Inclusion Criteria:

• Patients of both sexes aged 18-70 years attending outpatient clinics diagnosed with asthma at least one year before. GINA/GEMA criteria will be used to diagnose asthma and to rate its severity.

Exclusion Criteria:

• Illiterate patients;
• very severe, disabling comorbidity;
• prior non-inflammatory nasosinusal disease

Hospitals in Spain and Latin America