Figure 1.

Distribution of baseline audiograms in the cohort. Within each box, the horizontal line and × mark represent the median and mean, respectively. The box sizes correspond to the 25^th–75^th percentile (1^st–3^rd quartile), and the whiskers represent the full range, excluding the outliers. Represented by a circle, outliers were defined as data exceeding 1.5 times the interquartile range below the 1^st quartile or above the 3^rd quartile.