Table 1. Baseline characteristics.
| Characteristics | Benign (N = 9) | Malignant (N = 17) |
|---|---|---|
| Age—years, Median (IQR) | 62 (54–68) | 66 (58–70) |
| Male sex–no. (%) | 6 (67) | 12 (71) |
| Smoking History | ||
| Current–no. (%) | 5 (56) | 6 (35) |
| Former–no. (%) | 2 (22) | 11 (65) |
| Never–no. (%) | 2 (22) | 0 (0) |
| Pack Year, Median (IQR) | 40 (0–50) | 50 (45–60) |
| BMI, Median (IQR) | 33 (22–41) | 28 (23–34) |
| COPD–no. (%) | 3 (33) | 10 (59) |
| Days Between Scans, Median (IQR) | 19 (14–20) | 15 (11–23) |
| Lesion Size (cm), Median (IQR) | 1.6 (0.9–1.8) | 1.5 (1.2–3.8) |
| Spiculation–no. (%) | 2 (22) | 7 (41) |
| Nodule Location | ||
| Lower lobe–no. (%) | 2 (22) | 4 (24) |
| Upper lobe–no. (%) | 7 (78) | 13 (76) |
| Histologic Diagnosis | ||
| NSCLC–no. | 12 | |
| Malignant (Unknown type)–no. | 2 | |
| Renal cell carcinoma–no. | 1 | |
| Sarcomatoid carcinoma–no. | 1 | |
| SCLC–no. | 1 | |
| Stage | ||
| IA–no. | 5 | |
| IIB–no. | 1 | |
| III–no. | 5 | |
| IV–no. | 3 | |
| Stage IV (SCLC)–no. | 1 | |
| Metastatic from RCC–no. | 1 | |
| Unknown–no. | 1 |
BMI-Body Mass Index
COPD-Chronic Obstructive Pulmonary Disease
NSCLC-Non-Small Cell Lung Cancer
SCLC-Small Cell Lung Cancer
RCC-Renal Cell Carcinoma