Table 6 Predicted value and diagnostic value of prenatal screening for Trisomy 21 (%)
Group | Screening for disease | Sensitivity | Specificity | Positive predictive value | Negative predictive value | False positive rate | False negative rate |
|---|---|---|---|---|---|---|---|
AMA | Trisomy 21 | 71.43 | 80.56 | 0.80 | 99.92 | 19.43 | 28.57 |
Non-AMA | Trisomy 21 | 50.00 | 94.92 | 0.24 | 99.99 | 5.08 | 50.00 |