Table 4. Predictive performance of s-Flt1/PlGF ratio.
| Women with pre-eclampsia | Women without pre-eclampsia | Total | |
|---|---|---|---|
| At 1 week | |||
| s-Flt1/PlGF ratio < 38 | 0 | 53 | 53 |
| s-Flt1/PlGF ratio ≥ 38 | 3 | 11 | 14 |
| Total | 3 | 64 | 67 |
| Negative predictive value | 100% | ||
| Positive predictive value | 21% | ||
| At 4 weeks | |||
| s-Flt1/PlGF ratio < 38 | 0 | 53 (3 pre-eclampsia at 55, 86, and 93 days) | 53 |
| s-Flt1/PlGF ratio ≥ 38 | 2 | 9 | 11 |
| Total | 2 | 62 | 64 |
| Negative predictive value | 100% | ||
| Positive predictive value | 18% |
Results are shown as number or percentage when appropriate.