The statistical description of the training set and testing set
The original dataset consists of 2294 cases, which were randomly divided into a training set and a testing set. The training set includes 1605 cases (70%), and the testing set includes 689 cases (30%). The distribution differences of the 21 variables between the two groups were not statistically significant (P>0.05), as shown in Statistical description of the training and testing sets.(t-test or non-parametric test for numerical variables; chi-square test for categorical variables;The t-value/Z-value/X