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,