Abstract:Objective To investigate the impact of middle ear effusion on inner ear function in patients with otitis media with effusion (OME). Methods A retrospective analysis was conducted on the clinical data of 39 patients with unilateral OME accompanied by elevated bone conduction thresholds (case group) and 50 OME patients without bone conduction changes (control group) who were treated at Wuhu Hospital Affiliated to East China Normal University between January 2022 and January 2024. Hearing changes were compared among the affected ears, healthy-side ears, and post-treatment affected ears in the case group. The influence of relevant variables on bone conduction hearing of the affected ear before and after treatment was analyzed. Results The incidence of dizziness/vertigo in the case group was significantly higher than that in the control group (P=0.002), and the initial clinical intervention time was delayed compared with the control group (P=0.008). The case group mainly presented with high-frequency bone conduction hearing impairment, and the bone conduction thresholds at 2 kHz and 4 kHz of the affected ear [(34.10±13.27)dB, (29.49±15.04)dB]were significantly higher than those of the healthy-side ear [(20.26±11.00)dB, (19.87±12.59)dB, P<0.001]. After the effusion was relieved, the differences in bone conduction thresholds at 2 kHz and 4 kHz between the affected ear and the healthy-side ear were statistically significant (P=0.003). Multiple linear regression showed that mucous effusion was an unfavorable factor for the recovery of bone conduction hearing at 2 kHz (β=0.39, P=0.009), while early intervention (β=-0.402, P=0.024) and no dizziness symptoms (β=-0.413, P=0.007) were protective factors for the recovery of bone conduction hearing at 4 kHz. Conclusions Middle ear effusion may affect the inner ear function of OME patients, and some patients may experience dizziness/vertigo symptoms and irreversible decline in high-frequency bone conduction hearing. Early clinical intervention and accurate identification of the nature of middle ear effusion are of great clinical significance for improving the long-term hearing prognosis of OME patients.