Table 2.

The comparison in voice acoustic parameters of 21 patients preoperatively and postoperatively

	F0, Hz	Loudness	Jitter, %	Shimmer, %	MPT, s
Preoperative	231.12±74.39	68.33±13.67	1.74±1.23	5.22±3.30	6.11±2.17
3 months after surgery	205.07±56.35	76.89±9.11	0.37±0.29	1.72±1.13	12.27±3.92
t value	5.18	4.899	5.211	4.922	−12.16
p value	<0.001	<0.001	<0.001	<0.001	<0.001

MPT, maximal phonatory time.