Table 1.

Patient demographics and nodule characteristics

Cancer (n = 83)Benign (n = 69)Overall (n = 152)P
Mean age (SD)65 (8.8)60 (12)63 (10.7)0.002
Gender, male (%)61 (73)27 (39)88 (42)<0.001
Race (%)
 Caucasian71 (86)65 (94)136 (89)
 African American12 (14)2 (3)14 (9)
 Other0 (0)2 (3)2 (1)0.01
Ever smoker (%)957486<0.001
Mean nodule size, mm (SD)17.5 (6.4)16.1 (5.5)16.8 (6.1)0.15
Spiculated nodule edge (%)28 (34)14 (20)42 (28)0.07
Mean Mayo risk probability (SD)a50 (26)33 (23)42 (26)<0.001
Mean FDG-PET/CT SUV (SD)5.8 (4.3)3.2 (1.9)4.6 (3.7)<0.001
Avid nodules by FDG-PET/CTb63421050.05
  • aMayo risk probability estimated according to Swensen and colleagues (14).

  • bAvid FDG = PET/CT scan based on either SUV ≥ 2.5 or radiologist's report of avidity.