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Table 2 Root mean square error (RMSE) and mean absolute prediction error (MAPE) results obtained for the 5 models run in the full sample of 525,620 patients

From: Performance of statistical models to predict mental health and substance abuse cost

Model RMSE MAPE
  Estimate 95% Conf. Int.* Estimate 95% Conf. Int.*
Normal with Identity link (OLS) 10,397 10,130 10,657 2,997 2,941 3,052
Log Normal 13,974 13,585 14,352 2,801 2,759 2,840
Sqrt Normal 9,860 9,644 10,070 2,554 2,514 2,592
Gamma with log link 21,374 20,246 22,552 3,324 3,249 3,395
Gamma with square-root link 10,434 10,193 10,708 2,797 2,744 2,859
  1. * Bias-corrected bootstrap confidence interval