Risantoâ€™s Formulas is more Accurate in Determining Estimated Fetal Weight Based on Maternal Fundal Height
Objectives: To compare the accuracy of Johnsonâ€™s and Risantoâ€™s formulas in determining estimated fetal weight based on maternal fundal height (FH). Methods: This was a cross sectional study, consisting of 655 pregnant women from Dr. Sardjito Hospital and affiliated hospital sat 37-42 weeks of gestation. Fundal height was measured from the symphisis to the top of uterine fundus, using inverted unelastic flexible tape. EFW based on Johnsonâ€™s and Risantoâ€™s formulas were compared with the actualbirth weight. Wilcox on analysis was used for statistical analysis. Results: Mean EFW of Johnsonâ€™s formula was 3136 Â± 392.2 grams and EFW of Risantoâ€™s formula was 3056 Â± 322.5 grams and mean actual birth weight was 3021 Â± 341.1 grams. The mean difference between EFW of Johnsonâ€™s formula and the actual birth weight was 156.1 Â± 107.3 grams, and mean difference between EFW of Risantoâ€™s formula and the actual birth weight was 100.8 Â± 86.1 grams. Those two differences was statistically significant (p=0.001). Conclusion: This study showed that Risantoâ€™s formula was more accurate than Johnsonâ€™s in predicting birth weight based on the maternalâ€™s fundal height. [Indones J Obstet Gynecol 2013; 1-3: 149-51] Keywords: actual birth weight, fundal height, Johnsonâ€™s formula, Risantoâ€™s formula
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