Jmp 13 for windows

Values are presented as the mean ± standard error of the mean. Differences between measurements and groups were compared using Welch’s t-test. ROC curve analysis, Pearson's correlation coefficient, Spearman’s rank correlation coefficient, and logistic regression analysis were performed using JMP 13 for Windows software program (SAS Institute Inc., Cary, NC, USA). Cut-off values obtained from ROC curve analysis were determined according to the Youden Index^{57 (link)}. A two-tailed p-value of < 0.05 was considered significant.

Summary statistics were calculated using frequencies and proportions for categorical data and medians and ranges for continuous variables. Chi square tests were used for categorical data, and Mann–Whiney U tests and Kruskal–Wallis tests were used for continuous data.
Since there were differences in patient backgrounds and the style of operation among patients who continued to take aspirin (APT+) and those not on APT (APT−), we used a propensity score method to balance the observed covariates related to surgical invasiveness between the groups. Among patient factors, oncological factors and surgical factors, we chose the following as covariates which might affect surgical outcomes: sex, age, BMI, ASA-class, VTE risk classification, tumor location, lymphadenectomy, surgical curability and tumor stage. One-to-one propensity matching was performed using a caliper index of 0.20. Statistical analyses were performed using JMP13 for Windows (SAS Institute). P values of < 0.05 were considered significant.