Table E3.

Dimensions of hypothetical airways (Pi10 and Po20)

	Patients with severe asthma (n = 48)	Patients with mild-to-moderate asthma (n = 17)	Healthy control subjects (n = 30)	Significance (P value)
Inspiratory
Pi10 WA (mm2)	16.5 (1.7)	16.1 (1.5)	15.2 (1.3)	.002*
Po20 % WA	65.2 (2.3)	64.6 (2.4)	63.4 (1.6)	.002*

Data are expressed as means (SDs).

Intergroup comparisons

One-way ANOVA with the Tukey test to compare all pairs of columns: *P < .05, patients with severe asthma versus healthy control subjects; †P < .05, patients with mild-to-moderate asthma versus healthy control subjects; and ‡P < .05, patients with severe asthma versus patients with mild-to-moderate asthma.