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Table 3 Fetal positive karyotype analysis of NIPT

From: Prenatal diagnosis of 4953 pregnant women with indications for genetic amniocentesis in Northeast China

Fetal karyotype

False positive, n(%)

True positive, n(%)

Trisomy 21

18(18.56%)

46(47.42%)

Trisomy 18

6(6.19%)

8(8.25%)

Trisomy 13

2(2.06%)

1(1.03%)

Sex chromosome abnormal

8(8.25%)

4(4.12%)

Other chromosome abnormal

4(4.12%)

0(0.00)

Total

38(39.18%)

59(60.82%)