Machine learning-based comparison of factors influencing estimated glomerular filtration rate in Chinese women with or without non-alcoholic fatty liver

Figure 3 Equation of performance evaluation metrics. ŷ_i and y_i respectively represent predicted and actual values; n is the number of instances. SMAPE: Symmetric Mean Absolute Percentage Error; MAPE: Mean Absolute Percentage Error; RAE: Relative Absolute Error; RRSE: Root Relative Squared Error; RMSE: Root Mean Squared Error.