Comparison of two high-throughput semiconductor chip sequencing platforms in noninvasive prenatal testing for Down syndrome in early pregnancy

Table 2 Positive and negative predictive values. The positive and negative predictive values of the NIPT results for fetal trisomy 21 for the PGM and Proton sequencers used in this study

Chip	Positive predictive value (95 % CI)	Negative predictive value (95 % CI)
318 of PGM	100.0 % (47.8–100.0 %)	100.0 % (96.2–100.0 %)
PI of Proton	100.0 % (47.8–100.0 %)	100.0 % (96.2–100.0 %)

ISSN: 1755-8794