Presentations to Emergency Departments for COPD: A Time Series Analysis

Table 2

Overall optimal model and parameter estimates for COPD ED visit rates.

Parameter	Overall
Optimal model	(
Intercept	197.31 (10.31)
AR(1)	0.44 (0.08)
MA(1)	—
MA(2)	—
Seasonal AR(1)	0.89 (0.07)
Seasonal AR(2)
Seasonal MA(1)	−0.52 (0.16)
Seasonal MA(2)	—
AIC	1337.9

Parameter estimates are displayed with standard error in parentheses.