I suppose that you want to perform two-sample tests,I am planning a one sample study of 230 patients. I am thinking of using the one sample t-test and the binomial test to perform univariate analysis of the continuous and dichotomous variables, against a dichotomous outcome (death following surgery).

in order to compare deceased versus undeceased with

respect to your continuous (independent samples t-test,

or Mann-Whitney U-test) or dichotomous (Chi² test)

variables.

With kind regards

K.