Table 4.

Correlations between airway wall areas adjusted for body surface area and clinical parameters.

	Third-generation bronchi		Fourth-generation bronchi		Fifth-generation bronchi		Sixth-generation bronchi
	ρ	p-value	ρ	p-value	ρ	p-value	ρ	p-value
Age	0.566	<0.001	0.533	<0.001	0.562	<0.001	0.556	<0.001
Duration of asthma	0.057	0.725	0.182	0.260	−0.112	0.496	−0.149	0.367
Blood %eosinophil	0.005	0.977	0.169	0.311	0.071	0.675	0.146	0.390
Blood total IgE	−0.197	0.250	−0.204	0.233	−0.066	0.705	−0.177	0.310
FEV1, % predicted	0.056	0.734	0.099	0.544	0.202	0.217	0.174	0.289
FEV1/FVC ratio	−0.156	0.336	−0.219	0.174	−0.198	0.226	−0.192	0.240
MMF, % predicted	−0.089	0.585	−0.086	0.597	−0.073	0.659	−0.060	0.715
Inhaled corticosteroid dose	−0.141	0.400	−0.014	0.933	−0.184	0.268	−0.269	0.102

Data are expressed as Spearman rank correlation coefficient (ρ) and p-value. FVC, forced vital capacity; FEV₁, forced expiratory volume in 1 second; MMF, maximum mid-expiratory flow rate.