표 2. | Table 2. 서로 다른 튜브 깊이에서 세 가지 튜브 직경 간의 수위 변화 | Comparison of bubble level changes among three tube diameter (5, 7, 10 mm) at different water immersion depth (4, 7, 10 cm)

Parameters	Tube depth (cm)	Tube diameter (mm)			F-value	p-value
		5	7	10
Water level change (Ω)	4	532.00±18.37	527.88±18.76	508.70±13.96	14.371	<.001***
	7	531.82±13.88	525.70±16.35	510.00±15.86	15.910	<.001***
	10	531.58±11.07	530.70±7.38	503.47±9.75	16.710	<.001***
MPT (sec)	4	13.64±7.91	11.47±7.90	11.05±6.39	15.670	<.001***
	7	11.17±6.27	11.41±5.90	10.47±3.88	18.980	<.001***
	10	12.05±4.43	10.47±3.88	9.05±5.43	37.521	<.001***

p<.001.
MPT, maximum phonation time.