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Table 2 Efficiency of fetal DNA clinical testing for SCAs

From: Cell-free DNA screening for sex chromosomal aneuploidies in 9985 pregnancies: Italian single experience

SCA typeNIPT positiveKaryotype validatedTrue positiveFalse positivePPV performance % (CI95)Unconfirmed
Total SCAs312217577.3 (54.2–91.3)9
Monosomy X19139469.2 (38.9–89.6)6
Trisomy X4330100 (31–100)1
47, XXY654180 (29.9–98.9)1
47, XYY2110100 (5.5–100)1
  1. PPV positive predictive value