Table 3 High-risk rate and true positive percentage of fetal trisomy 21
From: Efficiency of non-invasive prenatal screening in pregnant women at advanced maternal age
Age(y) | No. of cases | No. of case with high-risk | Rate of cases with high-risk | TP | Rate of TP |
|---|---|---|---|---|---|
35 | 7044 | 19 | 0.27 | 16 | 0.23 |
36 | 6557 | 26 | 0.40 | 16 | 0.24 |
37 | 4921 | 16 | 0.33 | 13 | 0.26 |
38 | 3824 | 28 | 0.73 | 21 | 0.55 |
39 | 2669 | 8 | 0.30 | 6 | 0.22 |
40 | 1863 | 12 | 0.64 | 10 | 0.54 |
41 | 1044 | 17 | 1.63 | 14 | 1.34 |
42 | 672 | 6 | 0.89 | 6 | 0.89 |
43 | 389 | 6 | 1.54 | 4 | 1.03 |
≥44 | 330 | 7 | 2.12 | 5 | 1.52 |