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Table 3 Statistical parameters related to At/Et ratio predicting occurrence of RDS

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

At/Et ratio

(37 0/7–38 6/7 weeks of gestation.)

0.3155

93.22

96.78

0.926