| Total pregnancies | Total abnormalities | T21,18 or 13 or SCA | Atypical abnormalities | p |
---|---|---|---|---|---|
High risk for T21 ≥ 1 in 250 | 1799 | 99 | 79 (4.4%) | 20 (1.1%) | < 0.001* |
High risk for 18 ≥ 1 in 180 | 5 | 4 | 3 (60.0%) | 0 (0%) |  |
High risk for T21 and 18 | 51 | 34 | 33 (64.7%) | 2 (3.9%) | |
Risk of T21 > 1 in 100 | 793 | 111 | 97 (12.2%) | 13 (1.6%) | < 0.001* |
Risk of T21 < 1 in 100 | 1062 | 26 | 18 (1.7%) | 9 (0.8%) | |
Age ≥ 45 | 20 | 2 | 2 (10.0%) | 0 (0%) | 0.899 |
Age ≥ 35 < 45 | 1190 | 87 | 74 (6.2%) | 14 (1.2%) |  |
Age < 35 | 645 | 48 | 39 (6.0%) | 8 (1.2%) | |
NT (mm) median (range) | 1855 | 137 | 3.8 (1.1–12.2) | 2.4 (1.4–12.6) | |
NT MoM | 1855 | 137 | 2.26 (0.68–7.19) | 1.31 (0.82–7.15) | |
NT ≥ 3.5 mm | 216 | 65 | 55 (25.5%) | 9 (4.2%) | < 0.001* |
NT < 3.5 mm | 1639 | 72 | 60 (3.7%) | 13 (0.8%) | |
PAPP-A MoM | 1855 | 137 | 0.32 (0.05–2.32) | 0.39 (0.09–1.64) |  |
Low PAPP-A | 68 | 27 | 23 (33.8%) | 5 (7.4%) | < 0.001* |
Normal PAPP-A | 1787 | 110 | 92 (5.1%) | 17 (1.0%) | |
fβ-hCG MOM | 1855 | 137 | 1.44 (0.03–9.75) | 1.60 (0.24–4.07) |  |
Low or high fβ-hCG | 98 | 7 | 7 (7.1%) | 0 (0%) | 0.503 |
Normal fβ-hCG | 1757 | 130 | 108 (6.1%) | 22 (1.3%) |