Table 1.
Characteristics of Patients with Malignant or Benign PNs in a Training Set
| Characteristics | Patients with | Patients with |
|---|---|---|
| Malignant PNs (n = 68) | Benign PNs (n = 69) | |
| Clinical | ||
| Age | 67.23 (SD 9.99) | 66.25 (SD 8.12) |
| Sex | ||
| Male | 45 | 46 |
| Female | 23 | 23 |
| Race | ||
| African American | 20 | 21 |
| White | 48 | 48 |
| Smoking history | ||
| Current smoker | 40 | 41 |
| Former smoker | 28 | 28 |
| Pack-years | 44.76 (SD 13.27) | 23.69 (SD 12.46) |
| Years quit | 13.26 (SD 8.98) | 11.38 (SD 8.68) |
| History of cancer | 8 | 2 |
| Stage of non–small cell cancer | ||
| Stage I | 18 | |
| Stage II | 18 | |
| Stage III-VI | 22 | |
| Histological type | ||
| AC | 28 | |
| SCC | 25 | |
| LC | 5 | |
| SCLC | 10 | |
| Radiological | ||
| Nodule size (mm) | 20.39 (SD 11.27) | 12.56 (SD 8.38) |
| Nodule location | ||
| Left lower lobe | 9 | 14 |
| Left upper lobe | 25 | 18 |
| Right lower lobe | 15 | 19 |
| Right middle lobe | 4 | 6 |
| Right upper lobe | 15 | 9 |
| Nodule type (number) | ||
| Nonsolid or ground-glass opacity | 17 | 19 |
| Perifissural | 6 | 8 |
| Part-solid | 8 | 7 |
| Solid | 13 | 12 |
| Spiculation | 22 | 3 |