10-fold cross-validation of multi-linear regression model for Ki-67 by CT image parameters of 160 cases.

Note: R means multiple relative coefficient, R2 means determinate coefficient, MAE means mean absolute error, MRE means mean relative error and RMSE means root mean square error.R and R2 reflect fitting degree of regression models.MAE, MRE and RMSE reflect predictive accuracy of regression models. The lower MAE, MRE and RMSE are, the higher the predictive accuracy of regression model is.10-fold cross-validation of multi-linear regression model for Ki-67 by CT image parameters of 160 cases.注：复相关系数（multiple relative coefficient，记为R）、决定系数（determinate coefficient，记为R²）、平均绝对误差（mean absolute error，MAE）、平均相对误差（mean relative error，MRE）与均方根误差（root mean square error，RMSE）为回归模型的常用评价指标。其中，R与R²可反映回归模型的拟合程度；MAE、MRE及RMSE可反映回归模型的预测精度，且上述三项误差指标的数值越低，回归模型的预测精度越高。针对160例病例的CT图像参数构建的Ki-67多元线性回归模型的10折交叉验证。