Table 2.

Sex-related differences in average computed tomographic bronchial parameters for generation 5 to 7 bronchi in the smoking group.

Bronchial position	Bronchial parameter	Male	Female	P-value
Generation 5	LD (mm)	3.8 ± 0.4	3.5 ± 0.4	<0.001
	WT (mm)	1.5 ± 0.3	1.4 ± 0.3	0.03
	LA (mm2)	12.2 ± 2.4	10.1 ± 2.0	<0.001
	WA%	63.2 ± 1.4	73.7 ± 2.1	<0.001
Generation 6	LD (mm)	2.9 ± 0.2	2.8 ± 0.2	0.04
	WT (mm)	1.3 ± 0.3	1.2 ± 0.2	0.01
	LA (mm2)	10.9 ± 1.5	7.6 ± 2.0	<0.001
	WA%	65.7 ± 1.5	75.9 ± 1.4	<0.001
Generation 7	LD (mm)	2.1 ± 0.2	1.9 ± 0.1	<0.001
	WT (mm)	1.2 ± 0.3	1.1 ± 0.3	0.02
	LA (mm2)	8.8 ± 1.1	6.7 ± 1.4	<0.001
	WA%	69.2 ± 1.2	80.0 ± 1.4	<0.001

Data are presented as mean ± standard deviation.

LD, lumen diameter; WT, wall thickness; LA, lumen area.