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Table 4 The PPVs according to different CNV sizes

From: Noninvasive prenatal testing for chromosome aneuploidies and subchromosomal microdeletions/microduplications in a cohort of 42,910 single pregnancies with different clinical features

CNV sizeNIPT positiveTPFPUnverifiedPPV (%)
≤ 5 Mb375191320.83
Within 5–10 Mb1766550.00
> 10 Mb559242227.27
Total10920494028.99