Table 2: Univariate analysis of overall survival.

OS
5-year survival

Stage
 Stage I98%0.04
 Stages II–IV65%
Tumor size (cm)
 <1085%0.06
 ≥1078%
Mitotic index
 Low85%0.01
 Intermediate-high60%
Age (years)
 ≤6085%0.9
 >6086%
Nuclear atypia
 Yes80%0.3
 no87%
Residual disease
 RO70%0.05
 R1-257%
Tumor rupture
 Yes68%0.22
 No76%