The Outcomes and the Affecting Factors of Stapes Surgery for Otosclerosis

Objective: The primary objective of the present study was to estimate the success rate of stapes surgery for otosclerosis. The secondary objective was to find the factors affecting the outcomes. Material and Methods: This study was a retrospective study that included the ears of otosclerosis patients who underwent stapes surgery between January 2015 and December 2021. The successful outcome was the postoperative air-bone gap of 10 dB or less without sensorineural hearing loss. Results: One hundred fifty-five ears were included in the present study. The short-term success rate was 87 out of 155 (56.1%). After follow-up, eleven (7.1%) operated ears underwent revision surgery, and the long-term success rate was 72 out of 96 (75.0%). From multivariate analysis, A-ABG of 35 dB or less and BMI of 25 kg/m² or less had adjusted OR 4.6 (95% CI 2.0 to 10.2), p<0.01 and 2.4 (95% CI 1.1 to 5.0), p=0.02, respectively. Conclusion: The success rates of stapes surgery were 56.1% in the short-term and 75.0% in the long-term post-operation. Factors influencing the outcome included preoperative air-bone gap and body mass index. It is recommended that a prospective study be conducted to address the limitations of the present study.