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The results of prenatal diagnosis and clinical outcome
| SCA type | NIPT positive (N) | Karyotype analysis | Unverified (N) | Termination rate (%) | ||
|---|---|---|---|---|---|---|
| True positive (N) | False positive (N) | PPV (%) | ||||
| 45,X | 147 | 7 | 49 | 12.5 | 91 | 85.71 |
| 47,XXX | 61 | 15 | 14 | 51.72 | 33 | 20 |
| 47,XXY | 71 | 26 | 13 | 66.67 | 32 | 73.08 |
| 47,XYY | 35 | 10 | 2 | 83.33 | 22 | 10 |
SCA, sex chromosome aneuploidy; PPV, positive predictive value
