Changes in nasalance following FESS
The median preoperative nasalance scores of [a], [i], and [u] were 31.0 (IQR 16.0-44.0), 28.0 (IQR 18.8-54), and 9.5 (IQR 6.0-22.3), respectively. The 6-month postoperative values of [a], [i], and [u] were 30.0 (IQR 16.0-40), 36.0 (IQR 28.5-52.0), and 12.0 (IQR 7.5-20.0). The nasalance scores increased one year postoperatively to 34.5 (18.8-48.3) for [a], 38.0 (29.0-60.3) for [i] and 13.0 (8.3-23.7) for [u]. However, only the change in the nasalance score of [i] was statistically significant (p=0.012; Figure 1) 1 year after FESS. The patients were divided into two groups by surgical extension of FESS. Nasalance scores showed no difference in patients who received limited surgery 1 year after FESS (Table 3). However, the nasalance scores of [i], [m], and [MiMi] significantly increased in patients who received wide opening surgery 1 year after FESS. (Table 4).