Table 4.

Summary of forward multiple regression analyses between the measured independent variables: SOD, CAT and GPX activities in the tumor and the TBARS in the tumor as measured after two weeks on the diet but before DOX treatment or as measured 24 h after a single injection of DOX and the dependent variable, tumor growth rate during 5 weeks of DOC treatment.

Variable entered into equation	Parameter estimate	Partial R2 (Contribution each variable)	Cumulative R2 (Cumulative contribution)
Intercept	-17.3
GPX	0.138	0.78	0.78
TBARS after DOX	6.50	0.19	0.97