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Table 2 Demographics of the validation study populations (mass and other)

From: Clinical validation of a blood-based classifier for diagnostic evaluation of asymptomatic individuals with pulmonary nodules

  Validation
CXR finding: mass (n = 100) CXR finding: other (n = 56)
Control Lung cancer Control Lung cancer
Gender
 Male 28 28 22 22
 Female 22 22 6 6
Age (years)
 Mean (SD) 64.0 (4.9) 63.9 (4.9) 65.3 (5.5) 65.1 (4.9)
Smoking
 Ever smokers 45 45 28 28
 Never smokers 5 5
 Pack years mean (SD) 50.6 (35.1) 58.2 (37.9) 54.8 (32.9) 52.3 (30.9)
Abnormal suspicious finding
 Mass 50 50
 Pleural Mass 2 2
 Hilar 9 9
 Infiltrate 17 17
Stage
 I (%)   16 (32.0)   9 (32.1)
 II (%)   4 (8.0)   3 (10.7)
 III (%)   16 (32.0)   3 (10.7)
 IV (%)   10 (20.0)   8 (28.6)
 NA   4 (8.0)   5 (17.9)
Histology
 Adenocarcinoma (%)   24 (48.0)   12 (42.9)
 BAC (%)   3 (6.0)   2 (7.1)
 Squamous cell (%)   9 (18.0)   7 (25.0)
 Large cell (%)   4 (8.0)   1 (3.6)
 NSCLC (%)   6 (12.0)   1 (3.6)
 Small cell (%)   4 (8.0)   5 (17.9)