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Correlations between biochemical markers in first trimester screening
| Controls | trisomy 21 cases | ||
|---|---|---|---|
| gestational week | correlation | correlation | |
| ADAM12-S and PAPP-A | 8 | 0.40 | |
| 9 | 0.34 | ||
| 10 | 0.43 | ||
| Overall | 0.39 | 0.33 | |
| ADAM12-S and free β-hCG | 8 | 0.30 | |
| 9 | 0.10 | ||
| 10 | 0.28 | ||
| Overall | 0.21 | -0.02 |
Correlations between log MoM ADAM12-S and PAPP-A and log MoM ADAM12-S and free β-hCG in unaffected pregnancies (by gestational week) and in trisomy 21 pregnancies.
