Table 1: The mean and SD of amplitude and duration of swallow sound with and without modified Shaker exercise.

MeasuresMales ()Females () Total ()
(males and females)
MeanSDMeanSDMeanSD

Amplitude (µV)
 Without Shaker exercise27.3511.6928.919.0428.1910.26
 With Shaker exercise51.7421.2043.4219.7447.2420.64
Duration (msec)
 Without Shaker exercise0.1880.080.170.060.180.07
 With Shaker exercise0.1800.080.210.060.190.07