Table 1 Maternal factors and biomarker results for pregnancies that did and did not link to a pregnancy outcome record
Maternal factor at time of screen test | Pregnancies linked to an outcome N = 1650* | Unlinked pregnancies N = 201 | Test of difference |
|---|---|---|---|
| Â | mean (sd) | mean (sd) | Â |
Days gestation | 84.9 (6.0) | 85.7 (5.9) | P = 0.08 |
Age (years) | 32.6 (4.7) | 32.0 (4.8) | P = 0.13 |
Weight (kg) | 67.1 (14.4)†| 65.2 (14.4)†| P = 0.13 |
PAPP-A (MoM) | 1.19 (0.75) | 1.24 (0.80) | P = 0.49 |
free β-hCG (MoM) | 1.24 (0.81) | 1.18 (0.74) | P = 0.26 |
|  | ≤ 5 th percentile cutoff (%) | ≤ 5 th percentile cutoff (%) |  |
PAPP-A (MoM) | 5.3 | 3.5 | P = 0.28 |
free β-hCG (MoM) | 5.2 | 5.0 | P = 0.92 |