Figure 3. Comparison of the air-bone gaps between GPG and NGPG.
Air-bone gap(ABG)s were measured with average pure tone hearing thresholds at 0.5, 1, 2, and 4 kHz.Although there was no statistical difference (p >0.05), the mean values showed lower ABG in NGPGat 1- and 2-months visits,thereby indicatinga faster hearing improvement in NGPG.(dB; decibel, GPG; gelfoam-packing group, NGPG; non-gelfoam-packing group. Error bars indicate standard deviations.Student’s t-test.)