TABLE 2.

Change in voice measures across the cohort

	Preoperative Mean (SD)	Postoperative Mean (SD)	P
Perceptual measures
Roughness	0.6 (0.5)	0.9 (0.5)	.179
Breathiness	0.4 (0.6)	0.4 (0.5)	.822
Strain	0.1 (0.3)	0.1 (0.4)	.577
Low pitch	0.1 (0.3)	0.4 (0.5)	.035
High pitch	0.5 (0.8)	0.1 (0.3)	.067
Loudness	0.8 (0.7)	0.6 (0.5)	.452
Hoarseness	0.2 (0.6)	0.6 (0.8)	.112
Acoustic measures
CPP vowel (dB)	10.6 (2.2)	9.8 (2.5)	.308
CSID vowel	25.6 (29.6)	25.8 (14.7)	.332
CPP speech (dB)	7.7 (1.3)	7.3 (1.3)	.510
CPP F0 (dB)	137.1 (21.5)	139.4 (18.7)	.752
CSID speech	8.3 (13.1)	3.0 (17.8)	.174
Passage reading
Quantity of breaths	6.6 (3.1)	6.2 (2.5)	.859
Duration (seconds)	25.8 (7.0)	26.5 (8.3)	.990
Mean SPL (dB)	72.5 (5.6)	68.8 (4.9)	.139
Mean pitch (Hz)	134.2 (23.7)	138.2 (20.7)	.681
Mean pitch range (Hz)	157.3 (89.2)	114.6 (66.9)	.213
Mean phonatory airflow	155.0 (72.6)	171.8 (79.1)	.283
(mL/s)

CPP = cepstral peak prominence, CSID = cepstral spectral index of dysphonia, F0 = fundamental frequency, SPL = sound pressure level.