Air-bone gap and vertigo
During the 4-week follow-up, the air-bone gap closure was 17.55 dB in the endoscopic group and 17.69 dB in the endoscopic group (preoperative-postoperative ABG). There was no difference in hearing improvement between the endoscopic group and the endoscopic group (P=0.564, Figure 5C).
The rate of vertigo at the first weekend after operation was 8.33% in EES group and 10.42% in MES group. The experimental data of both groups were similar (Figure 6D).