Table 2: Results of Cox regression of overall survival on six cofactors.

CofactorP valueHazard Ratio

Resection (Y/N)0.00030.26
Actinomycin (Y/N)0.00930.28
Age ≥ 2 years (Y/N)0.01400.43
Male (Y/N)0.461.26
Radiation (Y/N)0.940.97
Chemotherapy (Y/N)0.991.01