Table 2.

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

67 Patients with malignant SPNs (stage I and II NSCLC)69 Patients with benign SPNs
Age, years, median (SD)66.4 (7.9)64.9 (8.5)
Sex
 Female24 (35.8%)23 (33.3%)
 Male43 (64.2%)46 (66.7%)
Race
 African American19 (28.4%)20 (28.9%)
 White48 (71.6%)49 (70.1%)
Nodule size (cm)
 Median (SD)2.5 (1.6)1.8 (1.7)
 Range0.5–4.50.1–3.9
Pack-years, median (SD)36.9 (25.7)34.6 (32.5)
Stages
 Stage I45 (67.2%)
 Stage II22 (32.8%)
Histologic types of NSCLC
 AC30 (44.8%)
 SCC31 (46.3%)
 Others6 (8.9%)

Abbreviation: AC, adenocarcinoma.