TABLE 3

Comparison of computed tomography derived vessel volumes according to the radiological severity of emphysema and interstitial lung disease (ILD)

	Emphysema			ILD
Variable	Mild	Moderate	Severe	Mild	Moderate	Severe
Pulmonary vessels <0.8 mm, mL·m⁻²	7.6⁺	9.6	11.9^#	7.9^¶^,+	4.9^#	5^#
Pulmonary vessels <1.2 mm, mL·m⁻²	16.2⁺	20	25.2^#	16.6^¶^,+	10.3^#	10.3^#
Pulmonary vessels <1.6 mm, mL·m⁻²	25.3⁺	31.1	39.1^#	25.7^¶^,+	16.5^#	16.1^#
Total lung volume, mL·m⁻²	2353	2639	3014	2107^¶	1618^#	1612
Total vessel volume, mL·m⁻²	71^¶^,+	90^#	96^#	70^¶^,+	48^#	44^#

^#: significant difference compared to mild; ^¶: significant difference compared to moderate; ⁺: significant difference compared to severe.