Sas 9 4 enterprise guide 8

We used chi-square tests to compare proportions, and t-tests were applied for the comparison of mean values that were normally distributed. In analyses of data that were not normally distributed, the t-test was substituted with Mann–Whitney U-test (Wilcoxon rank sum test). Regarding relevant variables, univariable logistic regression models were performed, followed by multivariable logistic regression models. The dataset was complete except for the Mosaic classifications of 175 patients. These missing values were not substituted. For the analyses, SAS 9.4/Enterprise Guide 8.2 (SAS institute, NC 27513-2414, USA) was used.

T-tests were used for age, Wilcoxon Rank Sum test (Mann Whitney U test) were used for comparisons with skew distributions and Chi-square tests for comparison of proportions. Initially, univariable logistic regression analyses were performed for relevant variables, which then were entered into fully adjusted logistic regression models. The SAS 9.4/Enterprise guide 8.2 was used for statistics.