Retroauricular subperiosteal vs systemic intravenous glucocorticoid administration on efficacy and blood glucose in diabetic patients with sudden deafness

Figure 1 Comparison of hearing recovery. Before treatment, the pure-tone audiometry thresholds of the observation and control groups were comparable (P = 0.823); following treatment, the pure-tone audiometry threshold of the observation group was markedly lower than that of the control group (P = 0.019). ^aP < 0.05; ^bP < 0.01 in the inter-group comparison.