Table 1.

The mean and SD of amplitude and duration of swallow sound with and without modified Shaker exercise.

Measures	Males (n = 23)		Females (n = 27)		Total (n = 50) (males and females)
	Mean	SD	Mean	SD	Mean	SD
Amplitude (µV)
Without Shaker exercise	27.35	11.69	28.91	9.04	28.19	10.26
With Shaker exercise	51.74	21.20	43.42	19.74	47.24	20.64
Duration (msec)
Without Shaker exercise	0.188	0.08	0.17	0.06	0.18	0.07
With Shaker exercise	0.180	0.08	0.21	0.06	0.19	0.07