Jmp for windows version 13

In the statistical analyses, comparisons between two groups were made using the Mann-Whitney test for continuous variables and either a χ² test or Fisher’s exact test (for any test involving a low number of samples) for categorical variables, with values of p < 0.05 regarded as significant. The determination of each cut-off was determined from the maximal Youden index for the ROC curve. Separate determinations were made for males and females, as muscle mass is significantly greater in males than in females regardless of age [11 (link)]. To identify prognostic factors, univariate analysis was performed first, followed by multivariate analysis using all significant variables from univariate analysis. On univariate analysis, the Mann-Whitney test was used for continuous variables, and the Pearson χ² test for categorical variables. Multivariate analysis was performed using logistic regression. The software used for all statistical analyses was JMP for Windows version 13.0 (SAS Institute, Cary, NC).