Objective: Sex discrepancies have been reported in chronic rhinosinusitis (CRS), but limited data exist exploring sex-specific biological processes and sinonasal quality of life.
Study design: Prospective cohort.
Setting: Academic medical center.
Methods: Demographics, clinical data, and sinonasal mucus were collected from patients with CRS presenting for surgical consideration over a 5-year period. A random forest model and linear regression were used to assess predictor variables for the 22-item Sino-Nasal Outcome Test (SNOT-22) and subdomains. Enzyme-linked immunosorbent assays were used to measure substance P and tryptase in a subset of mucus samples to explore biological differences by sex.
Results: In total, 520 patients were studied (mean age 48.3 years, 50.9% female). Males were older (50.1 vs 46.6 years, P = .008), had more polyp disease (48.2% vs 35.5%, P = .004), and had higher mean Lund-Mackay CT score (11.3 vs 9.5, P = .004). Females had a higher overall mean SNOT-22 (40.9 vs 46.9, P = .001) and higher scores in ear/facial, psychological, and sleep domains (P < .01). Age, objective disease measures, and sex were top predictors for total SNOT-22. Neither mucus substance P or tryptase, alone or paired with sex, correlated with total SNOT-22. Analysis of mucus biomarkers by sex revealed correlation between mucus tryptase in females with the extranasal subdomain (P = .01).
Conclusion: Sex differences exist in CRS disease manifestations and presentation for surgical consideration. Detection of mucus (substance P and tryptase) was reliable, but in this exploratory study, we were not able to establish neurogenic or allergic inflammatory processes as a large source of differential disease features between sexes.
Keywords: SNOT-22; chronic rhinosinusitis; chronic sinusitis; sex differences; substance P; tryptase.