Efficiency of non-invasive prenatal screening in pregnant women at advanced maternal age

Table 1 Screening results of common fetal chromosomal aneuploidies

Trisomy	No. of cases with high-risk results	TP	FP	No. of cases without prenatal diagnosis	FN
T21	145	111	11	23	1
T18	70	36	17	17	0
T13	22	5	13	4	0

Data are presented as n (%), unless otherwise indicated. TP: true positive; FP: false positive; FN: false negative

ISSN: 1471-2393