Table 3.
Detection rate of age, ultrasound, and serum biochemical factors among the Iranian pregnant women
| Characters (n = 1500) | n(%) | Risk ≥ 1:250 [n(%)] |
Detection rate [n(%)]
|
||
|---|---|---|---|---|---|
| Trisomy 21 | Trisomy 18 | Trisomy 13 | |||
| Maternal age | |||||
| 17 ≤ age ≤ 20 | 30 (2) | 5 | 2/30: %6.6 | 0 (0) | 0 (0) |
| 20 ≤ age ≤ 30 | 720 (48) | 158 | 8/30: %26.6 | 2/5: %40 | 1/2: %50 |
| 30 ≤ age ≤ 40 | 600 (40) | 167 | 18/30: %60 | 3/5: %60 | 1/2:%50 |
| ≥ 40 | 150 (10) | 42 | 2/30: %6.6 | 0 (0) | 0 (0) |
| NT ≥ 3 | 105 (7) | 40 | 2/30: %6.6 | 3/5: %60 | 1/2: %50 |
| Absent of nasal bone | 15 (1) | 9 | 13/30: %42.4 | 2/5: %40 | 0 (0) |
| fβ-hCG ≥ 2 MoM | 100 (6) | 21 | 10/30: %33.33 | 0 (0) | 0 (0) |
| PAPP-A ≤ 0.5 MoM | 102 (6.8) | 28 | 6/30: %17.8 | 3/5: %60 | 2/2:%100 |
| Tricuspid regurgitation | 9 (0.6) | 5 | 12/30: % 36.3 | 4/5:80 | 0 (0) |
MOM: Multiple of median, fβ-hCG: Free beta human chronic gonadotropin, PAPP-A: Pregnancy associated protein