Table 9.

Statistical comparison of differences in group means for each vibratory feature using videostroboscopy and simulated stroboscopy. Differences are statistically significant when p are less than .05 (*).

Group comparisons	Videostroboscopy			Simulated stroboscopy
	Difference in means	SEM	p	Difference in means	SEM	p
Left mucosal wave
Control vs. pre-surgery	15	7	.213	34	6	<.001*
Pre- vs. post-surgery	−4	5	.962	−13	4	.007*
Post-surgery vs. control	11	7	.565	21	6	.019*
Right mucosal wave
Control vs. pre-surgery	23	7	.007*	39	6	<.001*
Pre- vs. post-surgery	−4	4	.927	−8	3	<.001*
Post-surgery vs. control	19	7	.049*	31	6	.103
Left amplitude
Control vs. pre-surgery	12	2	<.001*	12	2	<.001*
Pre- vs. post-surgery	−5	2	.075	−7	2	<.001*
Post-surgery vs. control	8	2	.027*	5	2	.298
Right amplitude
Control vs. pre-surgery	13	2	<.001*	10	2	<.001*
Pre- vs. post-surgery	−3	1	.151	−4	1	.002*
Post-surgery vs. control	9	2	<.001*	5	2	.101
Left vocal fold edge
Control vs. pre-surgery	−36	5	<.001*	−32	4	<.001*
Pre- vs. post-surgery	10	3	.026*	13	3	<.001*
Post-surgery vs. control	−26	5	<.001*	−19	4	<.001*
Right vocal fold edge
Control vs. pre-surgery	−3	5	<.001*	−30	4	<.001*
Pre- vs. post-surgery	6	3	.408	13	2	<.001*
Post-surgery vs. control	−25	5	<.001*	−18	4	<.001*