Table 1. Patient characteristics.
| Characteristics (segments) | Overall population, n=71 (74 segments) | Unfavorable visibility (ÄI <20), n=27 (29 segments) |
|---|---|---|
| Age (yr) | ||
| Mean ± SD (range) | 66.4±10.8 (29.0–81.0) | 67.4±9.6 (41.0–81.0) |
| Male/female (ratio) | 34/37 (0.92) | 20/9 (2.22) |
| BMI (%) | ||
| Mean ± SD (range) | 22.4±3.9 (14.0–35.5) | 21.7±4.4 (14.0–35.5) |
| Tumor location (%) | ||
| Right upper | 16 (21.6) | 9 (31.0) |
| Right lower | 16 (21.6) | 9 (31.0) |
| Left upper | 28 (37.9) | 8 (27.6) |
| Left lower | 14 (18.9) | 3 (1.04) |
| %FEV1.0 (%) | ||
| Mean ± SD (range) | 79.3±7.7 (58.8–100.0) | 78.5±9.5 (58.8–100.0) |
| SI, (%) | ||
| Non | 34 (45.9) | 8 (27.6) |
| Light | 8 (10.8) | 3 (10.4) |
| Middle | 17 (23.0) | 7 (24.1) |
| Heavy | 15 (20.3) | 11 (37.9) |
| LAA, % | ||
| Mean ± SD (range) | 1.4±3.0 (0–19.8) | 2.8±4.3 (0–19.8) |
ÄI, ÄIntensity; BMI, body mass index; %FEV1.0, ratio of forced expiratory volume in 1 s to forced vital capacity; SI, smoking index; LAA, low attenuation area.