Repository of Research and Investigative Information

Repository of Research and Investigative Information

Torbat Heydariyeh University of Medical Sciences

Error Analysis for Determination of Accuracy of Johnson's Formula, Dare's Formula and Mother's Opinion for the Estimation of Birth Weight: Results of an Iranian Cross-Sectional Study

(2018) Error Analysis for Determination of Accuracy of Johnson's Formula, Dare's Formula and Mother's Opinion for the Estimation of Birth Weight: Results of an Iranian Cross-Sectional Study. Acta Facultatis Medicae Naissensis. pp. 320-329. ISSN 0351-6083

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Official URL: <Go to ISI>://WOS:000455500100007

Abstract

Accurate fetal weight estimation is important for the management of birth. According to the existing literature, none of the clinical techniques is superior to any other. This study aimed to compare error analysis for the determination of the accuracy of Johnson's formula, Dare's formula and mother's opinion for the estimation of birth weight. A cross-sectional study involving 147 full-term, cephalic, singleton pregnancies, was performed. The mother's opinion was recorded and Johnson's and Dare's formulas were used to calculate the fetal weight. Accuracy was determined by percentage error, absolute percentage error, and proportion of estimates within 10 of actual birth-weight. Statistical analysis was done using the RM ANOVA, Friedman and Cochran. P < 0.05 was considered significant. The birth weight was correctly estimated in 34.7, 58.5, 66 of the cases using the mother's estimate, Dare's and Johnson's formulas. Respectively the proportion of the mother's estimate and Dare's formula was significantly lower than that of Johnson's formula for all birth weights. No significant difference was observed in all the measures of accuracy for the low birth-weight range. The mean error of Johnson's formula in both normal weight and macrosomic groups was less than those obtained by the Dare's formula and mother's opinion. The Johnson's formula is more accurate in actual birth weight estimation than the Dare's one and mother's opinion. In the normal weight range, Johnson's formula is more accurate of the two, while in the macrosomic group, Dare's formula appears to be more accurate.

Item Type: Article
Keywords: fetal weight, birth weight, Iran
Page Range: pp. 320-329
Journal or Publication Title: Acta Facultatis Medicae Naissensis
Journal Index: ISI
Volume: 35
Number: 4
Identification Number: 10.2478/afmnai-2018-0034
ISSN: 0351-6083
Depositing User: دکتر محبوبه عبداللهی
URI: http://eprints.thums.ac.ir/id/eprint/1020

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