Table 3.

Parameters of the best seasonal autoregressive integrated average model with explicative variable (SARIMAX) for forecasting West Nile virus in the United States using Google Trends–generated data.

Parameter	Value	Hessian SD	95% CI	Asymptotic SD	95% CI
Constant	4.261	Refa	Ref	Ref	Ref
West Nile virus cases	0.022	0.055	–0.086, 0.130	Ref	Ref
MAb(1)	–0.867	0.101	–1.065, –0.670	0.124	–1.110, –0.624
SMAc(1)	0.672	0.120	0.436, 0.907	0.150	0.379, 0.965

^aRef: reference.

^bMA: nonseasonal component.

^cSMA: seasonal component.