Table 3.
Individual and combined predictive values of CVF acetate, fetal fibronectin, and cervical length for preterm birth.
| Test | AUROC (95% CI) |
|---|---|
| Acetate N.I. | 0.75 (0.60–91) |
| AceConc | 0.74 (0.57–0.90) |
| Fetal fibronectin | 0.76 (0.53–1.0) |
| Cervical length | 0.73 (0.52–0.94) |
| Fetal fibronectin + cervical length | 0.84 (0.64–1.0) |
| Fetal fibronectin + cervical length + acetate N.I. | 0.86 (0.69–0.95) |
| Fetal fibronectin + cervical length + AceConc | 0.81 (0.62–0.93) |
AUROC, area under the ROC curve; Acetate N.I., 1H-NMR acetate normalized integral; AceConc, acetate concentration measured by spectrophotometric technique.