표 4. | Table 4. 치료 전과 후 VHI, GRBS, F0 비교 | Comparison of VHI, GRBS, F0 before and after treatment

Variable	Before M (SD)	After M (SD)	t-value	p-value
VHI	63.67 (28.00)	38.13 (25.54)	5.391	<.001
G	2.13 (0.52)	1.32 (0.40)	8.951	<.001
R	1.95 (0.62)	1.30 (0.40)	6.747	<.001
B	2.10 (0.51)	1.65 (0.66)	9.355	<.001
S	1.65 (0.66)	1.02 (0.43)	5.917	<.001
F0 (Hz)	156.17 (37.75)	148.37 (38.32)	1.409	0.169

VHI, voice handicap index; GRBS, GRBAS scale; F0, fundamental frequency.