Table 7.

Correlations between airway tone and airway measurements

	Asthma	Health
Diameter baseline FRC	r = −0.59, P = 0.008*	P = 0.39
Diameter baseline TLC	r = −0.72, P = 0.0005*	P = 0.13
Diameter postalbuterol FRC	P = 0.53	P = 0.16
Diameter postalbuterol TLC	P = 0.15	P = 0.27
WT (frac dia) baseline FRC	r = 0.70, P = 0.0012*	P = 0.82
WT (frac dia) baseline TLC	r = 0.85, P < 0.0001*	P = 0.78
WT (frac dia) postalbuterol FRC	P = 0.72	P = 0.81
WT (frac dia) postalbuterol TLC	P = 0.11	P = 0.75
% Δ diameter FRC-TLC baseline	r = −0.60, P = 0.007*	r = −0.71, P = 0.03*
% Δ diameter FRC-TLC postalbuterol	r = −0.49, P = 0.03*	r = 0.21, P = 0.59

WT (frac dia), airway wall thickness expressed as a fraction of airway diameter.

^*P < 0.05.