Table 2

Patient baseline and disease characteristics (N = 1912)

N%
GenderFemale70036.6
Male121163.3
Unknown10.1
RaceWhite187197.8
Black140.7
Other/unknown150.5
Missing120.5
ECOGa performance status0158082.6
132917.2
Unknown30.2
Site of primary tumorHead/neck23212.1
Upper limb26513.8
Lower limb39620.7
Trunk82843.3
Other804.2
PigmentationAmelanotic1326.9
Melanotic141774.1
Unknown36319.0
UlcerationNo104654.7
Yes60131.4
Unknown26513.9
Disease at study entryPrimary99451.9
Recurrent91347.8
Unknown50.3
MicrometastasesNo31216.3
Yes241.3
Unknown157682.4
Satellite metastasesNo39620.7
Yes291.5
Unknown148777.8
Extranodal extensionNone/microscopic51226.8
Yes/extensive1326.9
Unknown126866.3
Tumor thickness<3 mm85944.9
≥3 mm86445.2
Unknown1899.9
Age≤49 yrs96250.3
>49 yrs94849.5
Unknown20.2
Primary tumor stageT125413.3
T240521.1
T335818.7
T470636.9
Unknown1899.9
Nodal stageN01176.1
N154728.6
N222912.0
N31829.5
Unknown83743.8
Size of primary tumor<1.44 mm72137.7
≥1.44 mm72638.0
Unknown46524.3
Size of largest lymph node<0.2 mm20210.6
≥0.2 mm36819.2
Unknown134270.2
WBC count<6.9 × 109/liter88546.3
≥6.9 × 109/liter93649.0
Unknown910.5
Lactate dehydrogenaseNormal145376.5
Abnormal27814.5
Unknown1818.9
  • a ECOG, Eastern Cooperative Oncology Group.