Table 3.
Percentage of spatial variation explained by each individual variable and explained in addition after adjusting for all other variables
| Spatial variation explained | Gestational age | Birth weight | ||
| Eligible population | Complete case population | Eligible population | Complete case population | |
| By single variables | ||||
| Pregnancy factor | ||||
| Gestational age | – | – | 27% | 34% |
| Sex | 0% | 0% | 1% | 2% |
| Birth rank | 0% | 1% | 4% | 0% |
| Parental factors | ||||
| Maternal age | 0% | 1% | 1% | 1% |
| Civil status | 0% | 0% | 10% | 5% |
| Nationality mother | 1% | 3% | 17% | 17% |
| Nationality father | 3% | 4% | 25% | 20% |
| Nationality parents* | 3% | 5% | 27% | 23% |
| Education mother | – | 1% | – | 0% |
| Education father | – | 1% | – | 1% |
| Education parents* | – | 1% | – | 1% |
| Regional factors | ||||
| Altitude | 0% | 0% | 10% | 6% |
| Urbanisation | 10% | 12% | 0% | 0% |
| Language region | 23% | 25% | 62% | 63% |
| In addition to all other variables | ||||
| Pregnancy factors | ||||
| Gestational age | – | – | 12% | 12% |
| Sex | 0% | 0% | 0% | 1% |
| Birth rank | 1% | 0% | 3% | 1% |
| Parental factors | ||||
| Maternal age | 0% | 1% | 0% | 0% |
| Civil status | 0% | 0% | 0% | 0% |
| Nationality mother | 0% | 0% | 1% | 2% |
| Nationality father | 1.5% | 0% | 1% | 0% |
| Nationality parents* | 2.5% | 0% | 3% | 4% |
| Education mother | – | 2% | – | 0% |
| Education father | – | 0% | – | 0% |
| Education parents | – | 2% | – | 1% |
| Regional factors | ||||
| Altitude | 0% | 0% | 9% | 4% |
| Urbanisation | 9% | 10% | 0% | 1% |
| Language region | 17% | 21% | 22% | 24% |
| Model 3 (full) | 31% | 39% | 87% | 88% |
–Data not available
*Nationality or educational attainment of both mother and father were entered into the model.