Table 5. Occurrences of PE according to folate dose groups.
| Dose group (mg) | Number of participants | Number of Preeclampsia | Rate of PE (%) | χ2 | P value* |
|---|---|---|---|---|---|
| All cases | |||||
| 0 | 404 | 17 | 4.21 | ||
| 0.1–0.9 | 241 | 6 | 2.49 | ||
| 1 | 5834 | 175 | 3.00 | 7.81 | 0.32 |
| 1.1–1.9 | 318 | 13 | 4.09 | ||
| 2.0–4.0 | 673 | 24 | 3.57 | ||
| > = 4.0 | 124 | 8 | 6.45 | ||
| Women with high risk pregnancy | |||||
| 0 | 56 | 8 | 14.29 | ||
| 0.1–0.9 | 24 | 2 | 8.33 | ||
| 1 | 629 | 55 | 8.74 | 0.37 | 0.98 |
| 1.1–1.9 | 42 | 5 | 11.90 | ||
| 2.0–4.0 | 92 | 13 | 14.13 | ||
| >4.0 | 26 | 1 | 3.85 | ||
| Women with low risk pregnancy | |||||
| 0 | 348 | 9 | 2.59 | ||
| 0.1–0.9 | 217 | 4 | 1.84 | ||
| 1 | 5205 | 120 | 2.31 | 11.00 | 0.37 |
| 1.1–1.9 | 276 | 8 | 2.90 | ||
| 2.0–4.0 | 581 | 11 | 1.89 | ||
| >4.0 | 98 | 7 | 7.14 |
* P value for Cochran-Armitage trend test