Table 1.
Parameters of the exponential semi-variogram for birthweight data for varying maximal distances (bold face: best fitting model)
| Birthweight | Residuals ∗ | ||||||
|---|---|---|---|---|---|---|---|
| Max. distance | Range | RSV | Bias ∗∗ | Max. distance | Range | RSV | Bias ∗∗ |
| 650 m | 183 m | 0.56 | 0.02 | 550 m | 599 m | 0.04 | -0.03 |
| 600 m | 172 m | 0.49 | 0.01 | 500 m | 100 m | 0.54 | -0.02 |
| 550 m | 171 m | 0.56 | 0.01 | 450 m | 108 m | 0.55 | -0.01 |
| 500 m | 197 | 0.44 | 0.02 | 400 m | 99 m | 0.53 | -0.03 |
| 450 m | 259 m | 0.47 | 0.06 | 350 m | 124 m | 0.40 | -0.01 |
∗ Residual after adjusting for gestational age, BMI, gravida, and income. ∗∗ Relative bias: (partial sill+ nugget - variance)/variance