Table 5 Correlations between airway inner luminal 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	0.060	0.715	−0.035	0.829	−0.016	0.921	0.019	0.910
Duration of asthma	0.165	0.310	0.142	0.382	0.025	0.881	−0.042	0.798
Blood %eosinophil	0.385	0.017	0.225	0.174	0.380	0.020	0.278	0.095
Blood total IgE	−0.034	0.843	0.031	0.856	0.137	0.433	0.149	0.394
FEV₁, % predicted	0.142	0.383	0.204	0.207	0.137	0.406	0.202	0.217
FEV₁/FVC ratio	0.087	0.595	0.162	0.318	0.207	0.206	0.247	0.129
MMF, % predicted	0.152	0.348	0.211	0.192	0.184	0.263	0.242	0.137
Inhaled corticosteroid dose	0.150	0.368	0.080	0.631	0.073	0.664	−0.080	0.635

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.

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