Real-world characterisation of patients with chronic rhinosinusitis with nasal polyps with and without surgery in England

Objectives: To characterise the real-world burden of chronic rhinosinusitis with nasal polyps (CRSwNP) in the UK, stratified by number of surgeries. Design: Retrospective cohort study. Setting: UK Clinical Practice Research Datalink Aurum database with Hospital Episodes Statistics linkage (2007-2019). Participants: Adults >= 18 years of age with a first NP diagnosis (index) and 365 days of baseline and >= 180 days of follow-up data. Follow-up continued until disenrollment, death or end of data collection. Main Outcome Measures: Primary: primary care physician prescribed CRSwNP-related treatments, and all-cause healthcare resource utilisation (HCRU) in 90 days post-index, stratified by surgeries during follow-up. Secondary: rate of surgery and CRSwNP point prevalence. Baseline patient demographics, clinical characteristics and comorbidities were also assessed. Results: Of the 33 107 patients included, 23.5% and 2.2% had > 1 and > 2 surgeries during follow-up, respectively (mean follow-up: 5.3 years). Patients with more surgeries (>= 2/>= 1/0) during follow-up were more likely to be male (67.3%/69.0%/58.0%), have asthma (37.8%/28.2%/20.2%) and have baseline blood eosinophil counts >= 300 cells/ mu L (68.5%/66.0%/51.5%). During the first 90-days post-index as surgery number increased, the proportion of patients using oral corticosteroids (25.8%/20.7%/14.2%) and mean (SD) number of all-cause healthcare visits (5.9 [4.2]/5.4 [4.0]/4.9 [4.2]) increased. Time between surgeries was shorter among patients with more surgeries. CRSwNP prevalence on 31 December 2018 was 476 cases per 100 000 persons. Conclusion: A small proportion of patients in the UK required multiple surgeries for CRSwNP and this was associated with increasing comorbidity burden, baseline blood eosinophil counts, CRSwNP-related treatment and HCRU use.