Table 3. Parameters contribution to final survival status prediction.

Feature	Gain	Relative importance
Risk scores	0.4158	100%
Age	0.2885	69.38%
Pathological N: 2	0.0647	15.56%
Pathological T: 3	0.0454	10.92%
Pathological T: 4	0.0399	9.60%
Pathological N: 0	0.0325	7.82%
Pathological stage: IV	0.0292	7.02%
Gender: Male	0.0285	6.85%
Pathological T: 2	0.0194	4.67%
Histologic grade: G3	0.0187	4.50%
Pathological stage: 3	0.0083	2.00%
Histologic grade: G2	0.0069	1.66%
Gender: Female	0.0023	0.55%