Table 3.
The sensitivity value in determining abortion when free β-HCG (≤20 mIU/mL), progesterone (≤20.45 ng/mL), and ischemia-modified albumin (IMA) (>0.886) levels are used as single or combined parameters.
| Sensitivity (%) |
Specificity (%) |
PPV (%) |
NPV (%) |
|
|---|---|---|---|---|
| Free β-HCG | 87 | 80 | 86 | 81 |
| Progesterone | 96 | 75 | 95 | 79 |
| IMA | 74 | 91 | 77 | 95 |
| Free β-HCG (≤20 mIU/mL) + progesterone (≤20.45 ng/mL) | 88 | 80 | 81 | 87 |
| Free β-HCG (≤20 mIU/mL) + IMA (>0.886) | 75 | 99 | 98 | 80 |
| Progesterone (≤20.45 ng/mL) + IMA (>0.886) | 75 | 97 | 97 | 80 |
| Free β-HCG (≤20 mIU/mL) + progesterone (≤20.45 ng/mL) + IMA (>0.886) | 75 | 99 | 98 | 76 |
PPV: positive predictive value.
NPV: negative predictive value.