| Parameter | Group | Mean ± SD | P-value |
| Sodium (mEq/l) | Preeclampsia | 133.31 ± 3.5 | 0.00 |
| Normal pregnant | 129.65 ± 0.8 | ||
| Potassium (mEq/l) | Preeclampsia | 3.8418 ± 0.3 | 0.00 |
| Normal pregnant | 3.6796 ± 0.1 |