Table 5.
Population attributable risks for SGA of area average income and maternal risk factors
| Population attributable risk | Population attributable risk % | SGA cases/year | |
|---|---|---|---|
| Crude |
|
|
|
| Average income quintile |
1.2 |
17.0 |
191 |
| Smoking during pregnancy |
0.2 |
2.2 |
22 |
| Parity (first birth) |
2.3 |
31.7 |
360 |
| Underweight (<18.5) |
0.5 |
6.3 |
69 |
| Height (bottom four quintiles) |
3.4 |
47.6 |
543 |
| Hypertension |
0.4 |
5.7 |
62 |
| Oligohydramnios |
0.4 |
6.1 |
66 |
| Placental disorder |
0.1 |
1.4 |
12 |
| Adjusted |
|
|
|
| Average income quintile |
1.1 |
13.6 |
181 |
| Smoking during pregnancy |
0.2 |
2.5 |
34 |
| Parity (first birth) |
2.6 |
32.1 |
415 |
| Underweight (<18.5) |
0.5 |
6.2 |
89 |
| Height (bottom four quintiles) |
4.1 |
50.6 |
651 |
| Hypertension |
0.5 |
6.2 |
77 |
| Oligohydramnios |
0.6 |
7.4 |
100 |
| Placental disorder | 0.1 | 1.2 | 14 |