Conclusion
A negative correlation was found between the nasalance score and the severity of rhinosinusitis in our cohort. Although unilateral CRS had a relatively lower disease burden, abnormal nasality was still reported in one-third of the patients preoperatively. The nasalance score significantly increased 1 year after FESS, particularly in patients with higher disease severity who received wide opening surgery. The increase in the nasalance score may represent a return to a normal status since the self-reported nasality assessment was significantly improved postoperatively.