Table 4. Akaike information criterion for quasi-Poisson(Q-AIC) values for the relationship between temperature measures and mumps incidence by DLNM type.
| DLNM type | Temperature measure | Q-AIC |
|---|---|---|
| Natural cubic spline-natural cubic spline(6df/year)a | Maximum temperature | 17022.92 |
| Mean temperature | 16984.23 | |
| Minimum temperature | 17007.85 | |
| Combined with case-crossover design(calendar month)b | Maximum temperature | 17254.83 |
| Mean temperature | 17252.24 | |
| Minimum temperature | 17252.90 |
a Using the natural cubic spline-natural cubic spline DLNM with 5 degrees of freedom for temperature, 3 degrees of freedom for lag and 6 degrees of freedom for controlling seasonality and the long-term trend; bUsing the natural cubic spline-natural cubic spline DLNM combined with case-crossover design(calendar month) to control seasonality and the long-term trend.