Investigate the association between sex and 5-year mortality for patients who have undergone surgery for melanoma.
First recode the variables as shown in the text, then plot the counts and proportions for 5-year disease-specific mortality in women and men. Is there an association between sex and mortality?
Make a table showing the relationship between sex and the variables age, T-stage and ulceration. Hint:
Express age in terms of median and interquartile range. Include a statistical comparison.
What associations do you see?
Run a logistic regression model for 5-year disease-specific mortality including sex, age, T-stage and ulceration.
What is the c-statistic for this model?
Is there a relationship between sex and mortality, after adjustment for the other explanatory variables?
Make an odds ratio plot for this model.