Audiometry
Three out of the 30 patients had missing data, and all three had unilateral OME. Consequently, the statistical evaluation was based on 40 audiometric results.
The mean difference between the pure tone average at the first and last visits was 10.30 ± 13.20 (p-value < 0.001).
When we performed a statistical analysis of the average air-bone gap, 3 audiometric results had zero air-bone gap at the beginning. The remaining 37 audiometry results were therefore used for the evaluation, which revealed a significant statistical difference (p-value = 0.042;Table 3 ).