표 3. | Table 3. 서로 다른 튜브 직경에서 세 가지 튜브 깊이 간의 수위 변화 | Comparison of bubble level changes among three water immersion depth (4, 7, 10 cm) at different tube diameter (5, 7, 10 mm)

Parameters	Tube diameter (mm)	Tube depth (cm)			F-value	p-value
		4	7	10
Water level change (Ω)	5	534.00±22.31	531.4±12.17	537.70±21.99	1.41	.258
	7	527.88±18.76	525.70±16.36	530.70±17.38	1.46	.246
	10	510.64±18.43	506.29±16.66	503.47±9.75	.90	.414
MPT (sec)	5	14.47±5.76	13.88±3.03	13.64±4.39	2.78	.0771
	7	12.05±5.88	11.41±5.90	10.94±4.81	3.74	.0432*
	10	11.17±6.91	11.05±7.27	9.05±5.43	4.06	0.027**

p<.05,
p>.01.
MPT, maximum phonation time.