Table 2. Comparison of pre-intervention and post-vocal intervention data of the self-assessment of voice in 17 IGHD subjects using the McNemar test.

Variable	Preintervention		Post-intervention		p
	n	%	n	%
1 = Excellent	6	35.3	15	88.2	0.004
2 = Very good
3 = Good
4 = Fair	11	64.7	2	11.8
5 = Poor