Table 3 Parameter estimation for secular trends and seasonality of omphalocele in each region/residential area of China
Model | Variable | Estimate | Standard error | Wald 95% confidence limits | Wald chi-square | p-value | |
|---|---|---|---|---|---|---|---|
ModelA1 | Year | −0.005 | 0.007 | −0.018 | 0.008 | 0.630 | 0.427 |
ModelB1 | Year | −0.001 | 0.009 | −0.018 | 0.017 | 0.010 | 0.935 |
ModelC1 | Year | −0.010 | 0.010 | −0.030 | 0.009 | 1.100 | 0.295 |
ModelD1 | Year | −0.007 | 0.008 | −0.024 | 0.009 | 0.730 | 0.393 |
ModelE2 | Year | −0.004 | 0.011 | −0.025 | 0.016 | 0.160 | 0.690 |
c1 | −0.161 | 0.063 | −0.283 | −0.038 | 6.620 | 0.010 | |
s1 | −0.078 | 0.062 | −0.200 | 0.045 | 1.550 | 0.214 | |
ψ | 0.179 | 0.063 | 0.056 | 0.302 | 8.121 | 0.004 | |
θ | 3.593 | 0.154 | 3.291 | 3.895 | 545.316 | <0.001 | |