Nasal polyp score and sinonasal quality of life
PROM, sinusitis, polyp, polyps, nasal obstruction, rhinosinusitis disability, 4=large polyps
SINUSITIS
The primary outcome measures included the nasal polyp score as an endoscopic measure and the rhinosinusitis disability index (RSDI) as a patient-reported outcome measure (PROM). Differences between the two groups were assessedat all time points. The endoscopic nasal polyp score was assessed at each time point with a 30° rigid endoscope (Karl Storz, Tuttlingen, Germany) for each nostril separately. The highest score per side was graded. Each nostril was scored from 0-4 (0=no polyps, 1= small polyps confined to the middle meatus, 2= blocked middle meatus 3= polyps extending beyond middle meatus, 4=large polyps causing almost complete nasal obstruction). Simultaneously, endoscopic pictures were taken for documentation purposes. At all time points, the endoscopy was recorded in a standardized fashion and was interpreted by a central investigator.The RSDI was used for the assessment of sinonasal-specific quality of life. The RSDI is a validated 30-item Likert-type scale instrument containing three subscales assessing the impact of sinusitis on physical, functional, and emotional domains (range: 0–120) (