Table 1 Demographic and clinical characteristics of the pregnant women (n = 12,243) enrolled in a study that investigated the use of noninvasive prenatal testing (NIPT) for screening for fetal sex chromosome aneuploidies
Characteristic | n (%) |
|---|---|
Chinese | 12,243 |
Singleton pregnancy | 12,243 |
Gestational age at NIPT 12–20 weeks | 12,243 |
Routine prenatal screening results | 3932(32.12) |
 High risk | 716(5.85) |
 Intermediate risk | 2903(23.71) |
 Low risk | 313(2.56) |
Others | 8311(67.88) |
IVF | 610(4.98) |
Maternal age, years | |
 <35 | 7382(60.30) |
 ≧35 | 4861(39.70) |
Total NIPT screen-positive | 169(1.38) |