. Author manuscript; available in PMC: 2016 Jan 15.

Published in final edited form as: Clin Cancer Res. 2015 Jan 15;21(2):484–489. doi: 10.1158/1078-0432.CCR-14-1873

Table 1.

The demographic and clinical variables of a training set of patients with malignant SPNs and patients with benign SPNs

	60 Patients with malignant SPNs (stage I and II NSCLC)	62 Patients with benign SPNs
Age, Median (SD)	67.3 (8.5)	66.4 (SD 8.5)
Sex
Female	22 (36.7%)	23 (37.1%)
Male	38 (63.3%)	39 (62.9%)
Race
African American	17 (28.3%)	19 (30.7%)
White	43 (71.7%)	43 (69.3%)
Nodule size (cm)
Median (SD)	2.3 (1.5)	1.7 (1.6)
Range	0.6–4.3	0.2–3.8
Pack-years, Median (SD)	37.3 (SD 26.5)	32.6 (SD 31.5)
Stages
stage I	39 (65.0%)
stage II	21 (35.0%)
Histological types of NSCLC
AC	27 (45.0%)
SCC	29 (48.3%)
Others	4 (6.7%)

Abbreviations: SPNs, solitary pulmonary nodules; SD, standard deviation; NSCLC, non-small-cell lung cancer; AC, adenocarcinoma; SCC, squamous cell carcinoma.