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Intrapartum Detection of a Maerosomie Fetus: Clinieal Versus 8 Sonographic Models

1995; Wiley; Volume: 35; Issue: 3 Linguagem: Inglês

10.1111/j.1479-828x.1995.tb01978.x

1479-828X

Suneet P. Chauhan, Bryan D. Cowan, Everett F. Magann, T. Hal Bradford, William E. Roberts, J C Morrison,

Gestational Diabetes Research and Management

The purpose of this study was to determine whether clinical or sonographic models have 1) the highest accuracy in differentiating newborns with birth-weights > or = 4,000 g (macrosomia) versus < or = 3,999 g, and 2) among macrosomics which method of predicting birth-weight has the lowest percentage error. Prospectively, 602 consecutive parturients at term had a clinical estimate of birth-weight followed by sonographic measurement of fetal parts. The sonographic prediction of birth-weight was derived using 8 different models that utilize either 1 measurement or a combination of 2 to 4 parameters. The incidence of macrosomia was 11.1% (67 of 602). Analysis of ROC curves indicated that clinical predictions (w = 0.85) were significantly better than 4 of the 8 sonographic models. The mean standardized absolute error among macrosomic newborns is significantly lower when predictions are derived clinically (99 +/- 70 g/kg) than using 1 or 2 fetal parts. Sonographic assessment of birth-weight is not significantly more accurate in the detection of a macrosomic fetus than clinical predictions.