Research Article
Presentations to Emergency Departments for COPD: A Time Series Analysis
Table 3
Subseries optimal models and parameter estimates for COPD ED visit rates.
| | Parameter | Female, age 55–64 | Female, age 65+ | Male, age 55–64 | Male, age 65+ | North | Edmonton | Central | Calgary | South |
| | Optimal model | | | | | | | | | | | Intercept | 113.49 (4.48) |
— | 106.99 (5.97) | 328.80 (16.10) | — | 152.99 (6.16) | — | 108.63 (5.65) | — | | AR(1) | — |
— | 0.39 (0.08) | 0.46 (0.08) | — | — | 0.32 (0.09) | 0.46 (0.08) | 0.22 (0.09) | | MA(1) | 0.33 (0.07) | −0.61 (0.08) | — | — | −0.60 (0.08) | 0.42 (0.08) | −0.97 (0.02) | — | −0.97 (0.02) | | MA(2) | — | −0.37 (0.08) | — | — | −0.34 (0.07) | — | — | — | — | | Seasonal AR(1) | 0.32 (0.09) | 0.38 (0.09) | 0.32 (0.09) | 0.88 (0.07) | 0.92 (0.07) | 0.83 (0.08) | 0.92 (0.06) | 0.95 (0.06) | 0.93 (0.06) | | Seasonal AR(2) | 0.19 (0.10) | 0.31 (0.09) | 0.33 (0.10) | — | — | — | — | — | — | | Seasonal MA(1) | — |
— | — | −0.56 (0.16) | −0.67 (0.17) | −0.46 (0.14) | −0.68 (0.13) | −0.54 (0.13) | −0.71 (0.14) | | Seasonal MA(2) | — |
— | — | — | — | — | — | −0.23 (0.12) | — | | AIC | 1309.7 | 1404.7 | 1269.8 | 1482.2 | 1635.5 | 1303.8 | 1590.1 | 1185.8 | 1467.7 |
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Parameter estimates are displayed with standard error in parentheses.
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