Table 4.

Statistical results for pre- and post-treatment comparisons

	Friedman	Pre-treatment	Pre- to immediately post-treatment		Pre- to 8 weeks post-treatment		Post-treatment
Session:		1–2	1–3	2–3	1–4	2–4	3–4
Length	.003	.116	.014	.001	.131	.011	.081
G	< 0.001	.499	.002	.056	< .001	.001	.043
R	0.009	.673	.006	.008	.108	.078	.028
B	< 0.001	.839	.048	.028	< .001	.001	.140
A	< 0.001	.499	.002	.056	< .001	.001	.043
S	0.466	---	---	---	---	---	---

All values denote p values. Significant results are marked in italics

G grade, R roughness, B breathiness, A asthenia, S strain