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Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age

OBJECTIVE: The aim of this study was to propose simple mathematical formulae to estimate median values of fetal biometry including biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) at each gestational age (GA) easily without looking up the previously established reference...

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Autores principales: Choi, Hwa Young, Kim, Jeong Ha, Park, Jee Yoon, Jung, Eun Young, No, Jae Hong, Oh, Kyung Joon, Hong, Joon-Seok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Society of Obstetrics and Gynecology; Korean Society of Contraception and Reproductive Health; Korean Society of Gynecologic Endocrinology; Korean Society of Gynecologic Endoscopy and Minimal Invasive Surgery; Korean Society of Maternal Fetal Medicine; Korean Society of Ultrasound in Obstetrics and Gynecology; Korean Urogynecologic Society 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4796092/
https://www.ncbi.nlm.nih.gov/pubmed/27004198
http://dx.doi.org/10.5468/ogs.2016.59.2.91
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author Choi, Hwa Young
Kim, Jeong Ha
Park, Jee Yoon
Jung, Eun Young
No, Jae Hong
Oh, Kyung Joon
Hong, Joon-Seok
author_facet Choi, Hwa Young
Kim, Jeong Ha
Park, Jee Yoon
Jung, Eun Young
No, Jae Hong
Oh, Kyung Joon
Hong, Joon-Seok
author_sort Choi, Hwa Young
collection PubMed
description OBJECTIVE: The aim of this study was to propose simple mathematical formulae to estimate median values of fetal biometry including biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) at each gestational age (GA) easily without looking up the previously established reference values. METHODS: Simple mathematical formulae to estimate median values of fetal biometric values at each gestational week were inferred. To validate these formulae, three different linear equations were derived from previously reported reference values of median BPD, AC and FL using regression analysis at each gestational week. Finally, calculated data through the inferred formula were compared to retrospectively collected data (observed data). RESULTS: The equation revealing the relationship between BPD and GA was: median BPD (cm)=GA (wk)/4. Using this simple mathematical formula, the absolute percentage error between observed data and calculated data ranged from 0.12% to 7.50%. The equation between AC and GA was: median AC (cm)=GA (wk)-5. Through this formula, the absolute percentage error was analyzed same as above and it ranged from 0.30% to 4.76%. Lastly the derived formula between FL and GA was: median FL (cm)=GA (wk)/5 and the absolute percentage error ranged from 4.52% to 16.75%. CONCLUSION: The three simple formulae suggested in our study showed a significantly easy way to estimate the median values of fetal biometry at each gestational week with good reliability.
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spelling pubmed-47960922016-03-21 Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age Choi, Hwa Young Kim, Jeong Ha Park, Jee Yoon Jung, Eun Young No, Jae Hong Oh, Kyung Joon Hong, Joon-Seok Obstet Gynecol Sci Original Article OBJECTIVE: The aim of this study was to propose simple mathematical formulae to estimate median values of fetal biometry including biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) at each gestational age (GA) easily without looking up the previously established reference values. METHODS: Simple mathematical formulae to estimate median values of fetal biometric values at each gestational week were inferred. To validate these formulae, three different linear equations were derived from previously reported reference values of median BPD, AC and FL using regression analysis at each gestational week. Finally, calculated data through the inferred formula were compared to retrospectively collected data (observed data). RESULTS: The equation revealing the relationship between BPD and GA was: median BPD (cm)=GA (wk)/4. Using this simple mathematical formula, the absolute percentage error between observed data and calculated data ranged from 0.12% to 7.50%. The equation between AC and GA was: median AC (cm)=GA (wk)-5. Through this formula, the absolute percentage error was analyzed same as above and it ranged from 0.30% to 4.76%. Lastly the derived formula between FL and GA was: median FL (cm)=GA (wk)/5 and the absolute percentage error ranged from 4.52% to 16.75%. CONCLUSION: The three simple formulae suggested in our study showed a significantly easy way to estimate the median values of fetal biometry at each gestational week with good reliability. Korean Society of Obstetrics and Gynecology; Korean Society of Contraception and Reproductive Health; Korean Society of Gynecologic Endocrinology; Korean Society of Gynecologic Endoscopy and Minimal Invasive Surgery; Korean Society of Maternal Fetal Medicine; Korean Society of Ultrasound in Obstetrics and Gynecology; Korean Urogynecologic Society 2016-03 2016-03-16 /pmc/articles/PMC4796092/ /pubmed/27004198 http://dx.doi.org/10.5468/ogs.2016.59.2.91 Text en Copyright © 2016 Korean Society of Obstetrics and Gynecology http://creativecommons.org/licenses/by-nc/3.0/ Articles published in Obstet Gynecol Sci are open-access, distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Choi, Hwa Young
Kim, Jeong Ha
Park, Jee Yoon
Jung, Eun Young
No, Jae Hong
Oh, Kyung Joon
Hong, Joon-Seok
Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title_full Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title_fullStr Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title_full_unstemmed Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title_short Simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
title_sort simple mathematical formulae for estimation of median values of fetal biometry at each gestational age
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4796092/
https://www.ncbi.nlm.nih.gov/pubmed/27004198
http://dx.doi.org/10.5468/ogs.2016.59.2.91
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