Table 3.

The demographic and clinical variables of an external testing set of patients with malignant SPNs and patients with benign SPNs

76 Patients with malignant SPNs (stage I and II NSCLC)79 Patients with benign SPNs
Age, years, median (SD)68.7 (9.2)67.9 (8.3)
Sex
 Female27 (35.5%)26 (32.9%)
 Male49 (64.5%)53 (67.1%)
Race
 African American22 (28.9%)23 (29.1%)
 White54 (71.1%)56 (70.9%)
Nodule size (cm)
 Median (SD)2.3 (1.7)1.9 (1.5)
 Range0.4–4.50.2–4.0
Pack-years, median (SD)39.3 (26.4)32.7 (31.3)
Stages
 stage I51 (67.1%)
 stage II25 (32.9%)
Histologic types of NSCLC
 Adenocarcinoma34 (44.7%)
 SCC35 (46.1%)
 Others7 (9.2%)