The F Ratio for the model was significant F (23,190) =

4.23, E = .0001 The value of R2 was .34. The F ratios for

the partial regression coefficients of each of the four

independent variables were also significant at the .05 level.

 The second regression model used age, stage, histology,

initial treatment, and subsequent treatment as independent

variables. In addition to the cases excluded in the analysis

of the first model, cases with a missing value for the

variable histology were excluded. The resulting number for

analysis was 197.

 This model was also significant with F (26,170) = 3.36,
 2
S= .0001. The value of R = .36. With the exception of

histology ( p = .2599) the partial regression coefficients

for the independent variables were significant at the .05

level.

 The third model used as independent variables four main

effects (age, stage, initial treatment, and subsequent

treatment) and one interaction, that of Stage x Initial

Treatment. The analysis was based on 214 cases.

 This regression model was also significant F (43,170)

= 2.98, p = .0001 The squared multiple correlation

coefficient was equal to .43. The interaction was not

significant ( p = .1491).

 The last regression model included as independent

variables age, stage, histology, initial treatment,