Table 1

Model fit tests for each ambulance service

Ambulance serviceModel fitness testsAkaike’s information criterion (AIC)Corrected AICBayesian information criterionSchwarz Bayesian criterionModel selected
DARIMA130.063−127.481−119.862−119.298
SARIMA169.131−166.022−152.606−152.983SARIMA {1,0,1},{0,1,2}12
GARIMA113.001−110.634−100.595−104.792
SARIMA155.229−152.444−134.769−141.548SARIMA {0,1,0},{1,1,2}12
EARIMA127.562−125.006−117.629−116.617
SARIMA123.077−120.021−110.713−106.66SARIMA {1,0,1},{1,1,1}12
HARIMA150.431−147.608−135.31−136.975
SARIMA120.737−117.913−107.612−107.28SARIMA {1,0,0},{2,1,0}12
  • AIC shown in bold was used for model selection.

  • ARIMA, autoregressive integrated moving average; SARIMA, seasonal ARIMA.