Table 1.
Number of all vessel segments, vessel density, normalized vessel volume, and tortuosity for arteries, veins, and all vessels by gender.
| All subjects (n = 123) | Men (n = 55) | Women (n = 68) | ||
|---|---|---|---|---|
| N (1) | Arteries | 487 (390–587) | 536 (420–617) | 445 (364–543) |
| Veins | 471 (371–551) | 499 (395–562) | 445 (360–527) | |
| All vessels | 977 (768–1115) | 1042 (825–1206) | 867 (711–1060) | |
| N/Vlung (1/L) | Arteries | 106.7 (87.8–122.5) | 98.1 (82.0–118.1) | 111.4 (94.8–126.0) |
| Veins | 101.9 (84.6–119.0) | 90.2 (77.7–106.7) | 111.1 (95.6–122.7) | |
| All vessels | 206.0 (181.5–237.8) | 191.3 (160.6–203.0) | 216.7 (192.8–260.7) | |
| V/Vlung (%) | Arteries | 1.52 (1.36–1.79) | 1.52 (1.36–1.77) | 1.53 (1.36–1.84) |
| Veins | 1.54 (1.37–1.71) | 1.47 (1.29–1.64) | 1.57 (1.41–1.75) | |
| All vessels | 3.06 (2.72–3.47) | 3.04 (2.67–3.36) | 3.08 (2.75–3.57) | |
| SOAM (rad/m) | Arteries | 142.9 (139.7–146.0) | 141.9 (138.3–145.8) | 143.5 (140.5–146.2) |
| Veins | 140.6 (137.6–144.1) | 140.9 (137.8–143.6) | 140.4 (137.5–144.3) | |
| All vessels | 142.1 (138.3–144.5) | 140.8 (137.6–144.5) | 142.7 (138.8–144.8) |
Values are given as median (interquartile range) for both lungs. N, sum of arterial and venous vessel segments; Vlung, lung volume determined from CT image; V, volume of vessel segments with diameters between 2 and 10 mm; SOAM, tortuosity of vessel segments assessed by sum-of-angles metric.