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. Author manuscript; available in PMC: 2008 Oct 7.
Published in final edited form as: Chest. 2007 Oct;132(4):1247–1252. doi: 10.1378/chest.07-0622

Table 2. Baseline Characteristics of the Study Participants.

Characteristics Lung Cancer Patients
(n = 13)		 High-Risk Smokers
(n = 33)		 Z score or χ2 (p Value)
Median (range) pack-years, No. 30 (0–120) 44 (19–220) − 1.31 (0.10)
Median nodule size (range), mm 13 (8–40) 5 (3–15) 4.71 (<0.0001)
With COPD, % 54 76 1.03 (0.31)
With solitary nodules, % 38 18 2.11 (0.15)