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. 2021 Nov 11;12:788878. doi: 10.3389/fendo.2021.788878

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Copyright © 2021 Huang, Yu, Chiang, Wu, Fu, Tai, Lin, Tseng, Lee and Lin

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Voice parameter changes in patients with different severity of objective high-pitched voice impairment (HPVI) and patients with subjective HPVI in each follow-up period. Red line = Fmax decrease <20%; Olive line = Fmax decrease 20-40%; Green line = Fmax decrease 40-60%; Blue line = Fmax decrease > 60%; Purple line = Patients with subjective HPVI. period-I = Preoperative period (within 2 months before surgery); period-II = Immediate postoperative period (median duration of 3 days; range of 1-7 days); period-III = Short-term postoperative period (median duration of 12 days; range of 7-30 days); period-IV = Long-term postoperative period (median duration of 40 days, range of 30-90 days). A p value less than 0.05 was considered statistically significant.