Table 5.

Evaluation of NIPSCCD method in detecting fetal chromosomal aneuploidies

Trisomy	Karyotyping	NIPSCCD results	TP	FP	FN	TN	Sensitivity (%)	Specificity (%)
T21	86	100	86	14	0	19,903	100.00	99.93
T18	15	19	15	4	0	19,984	100.00	99.98
T13	2	5	2	3	0	19,998	100.00	99.99
Total	103	124	103	21	0	19,879	100.00	99.89

TP, true positive; FP, false positive; FN, false negative; TN, true negative.