Table 4.

Multivariate analysis results

Multivariate analysis variable	p-value
Age at diagnosis	p < 0.0001
Race	p < 0.0001
Sex	p < 0.0001
Primary site	p < 0.0001
Histological subtype	p = 0.2
AJCC overall stage	p < 0.0001
Surgical vs. nonsurgical treatment	p < 0.0001
T stage	p < 0.0001
N stage	p < 0.0001
M stage	p < 0.0001
Tumor grade	p < 0.0001