Table 3 The independently predictive value of ARSA or combined ARSA for chromosomal abnormalities
| Group | Index |
Sensitivity (95% CI) |
Specificity (95% CI) |
Positive predictive value (95% CI) | Negative predictive value | Likelihood ratio |
|---|---|---|---|---|---|---|
| Entirecohort | ARSA | 11.76% (6.23–19.65) % | 99.39% (99.24–99.51) % | 12.63% (6.70–21.03) % | 99.34% (99.19–99.47) % | 19.26 |
| Combined ARSA | 10.78% (5.51–18.48) % | 99.85% (99.76–99.90) % | 34.38% (18.57–53.19) % | 99.33% (99.18–99.46) % | 69.76 | |
| AMA | ARSA | 13.51% (4.54–28.77) % | 99.29% (98.91–99.57) % | 20.00% (6.83–40.70) % | 98.87% (98.41–99.23) % | 19.07 |
| Combined ARSA | 10.81% (3.03–25.42) % | 99.96% (99.90–99.98) % | 40.00% (12.16–73.76) % | 99.76% (99.66–99.83) % | 246.00 | |
| non-AMA | ARSA | 10.77% (4.44–20.94) % | 99.41% (99.25–99.55) % | 10.00% (4.12–19.52) % | 99.46% (99.30–99.59) % | 18.40 |
| Combined ARSA | 10.77% (4.44–20.94) % | 99.89% (99.82–99.94) % | 31.82% (13.86–54.87) % | 99.58% (99.45–99.68) % | 97.82 |