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Table 2 Comparison of 1-step ahead models with and without external regressors

From: Time series analysis of malaria in Afghanistan: using ARIMA models to predict future trends in incidence

ARIMA model Lag-2 EVI coefficient Standard error AIC MSE
Model 1    −145.02 0.0088
Model 1 with Lag-2 EVI 0.6287 0.4719 −121.99 0.0142
Model 2    −132.18 0.0098
Model 2 with Lag-2 EVI 0.1728 0.7304 −147.92 0.0086