Figure 2From: A randomized controlled clinical trial of topical insulin-like growth factor-1 therapy for sudden deafness refractory to systemic corticosteroid treatment Changes in pure-tone average hearing thresholds over time. The difference between IGF-1 and dexamethasone (Dex) treatments in changes in pure-tone average hearing thresholds over time was statistically significant. Captions in the graph show mean values. Bars represent 95% confidence intervals.Back to article page