From: Validity of foetal Doppler indices in predicting postnatal respiratory distress syndrome: a prospective study
Cut off value
Sensitivity (%)
Specificity (%)
Area under the curve
At/Et ratio
(34 0/7–36 6/7 weeks of gestation)
0.2865
89.45
94.79
0.883
(37 0/7–38 6/7 weeks of gestation.)
0.3155
93.22
96.78
0.926