Table 2.

Summary statistics and analysis of the PTF

CONDITION	EXTENSION MEANS (SD)	P-VALUE^*	CONDITION	RESTRICTION MEANS (SD)	P-VALUE**
CONTROL	12.38 (4.00)	-	CONTROL	10.65 (3.47)	-
5 CM	10.89 (3.89)	.436	3 MM (n=12)	6.99 (4.06)	.005^†
25 CM	10.83 (4.30)	.301	9 MM	10.22 (4.18)	.75
50 CM	11.06 (4.15)	.206	15 MM	9.55 (3.88)	.014^†
75 CM	11.08 (3.80)	.627	21 MM	10.20 (3.90)	.769
POST CONTROL	11.76 (4.55)	.996	POST CONTROL	10.21 (4.17)	.747

Table 2 PTF in L/min. Table 2 shows the means and standard deviations of the phonation threshold flow in addition to the results of repeated measures ANOVA. The left half shows the results for the straw extensions and the right half shows results from the straw restrictions. The 3 mm restriction worked only in 12 larynges, which represents less than half of the total larynges (n=29).

p-value using a repeated measures ANOVA with Sidak correction for a condition versus control. Data were transformed using a log₁₀ transformation in order to meet the normality condition.

^†

Significant at the .05 level