PMID: 18711988Aug 21, 2008Paper

Clinical estimation of fetal weight in low resource settings: comparison of Johnson's formula and the palpation method

Ethiopian Medical Journal
Wondwossen Belete, Asheber Gaym

Abstract

Estimation of fetal weight is important for antenatal and intrapartum clinical decision-making. Sonographic estimates may not always be available in low resource settings. In such instances it is essential to study the reliability of clinical estimation of fetal weight in assisting decision-making. Estimate the accuracy of the Johnson's formula and the palpation methods of fetal weight estimation and their correlation. Maternity units of three teaching hospitals (Tikur Anbessa, Gandhi Memorial and Saint Paul's) in Addis Ababa, Ethiopia. Three hundred and twenty mothers were included in the study at the three hospitals from May 1 to September 30, 2004. Fetal weight was estimated for each mother using both methods prior to delivery. Accuracy of estimation was determined by the percentage error, absolute percentage error and the proportion of estimates within 10% of the actual birth weight. Statistical analysis was performed using the student's t test, paired t test, comparison of correlated variances using the modified F test, Wilcoxon sign test and the X2 test. Actual birth weight was 3152 +/- 494 grams; ranging from 1600-5250. The mean of all error terms of EFW (estimated fetal weight) with palpation method were significantly s...Continue Reading

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