title: Validity of common ultrasound methods of fetal weight estimation in late pregnancy among women in Kwale, Niger Delta region, Nigeria.
abstract: BACKGROUND
  Accuracy of some ultrasound equations used in our locality for fetal weight estimation is doubtful.
  
  
  OBJECTIVE
  To assess the accuracy of common ultrasound equations used for fetal weight estimation.
  
  
  METHODS
  A longitudinal study was conducted on selected Nigerian obstetric population at Central Hospital, Kwale between March, 2009 and January, 2011. Sonography was performed on 412 women with advanced singleton cyesis and measurements of BPD, HC, AC, and FL were obtained and figured into 12 common ultrasound equations for the estimation of fetal weight. The actual birth weight at delivery was recorded.
  
  
  RESULTS
  The highest intraclass correlation coefficient was generated by the Hadlock 5 and Hsieh 2 equations. The least mean absolute percent error was obtained with Hsieh 2 equation, followed by Woo 3, and Hadlock 5. These equations also had the least percentage error and the least range of limits of agreement in the same order with no significant difference between their mean fetal weight estimates and that of the actual birth weight (p > 0.05). All twelve equations had strong positive correlation with the actual birth weight with Nzeh 2 equation the least.
  
  
  CONCLUSIONS
  Hsieh 2 equation has the best accuracy in fetal weight estimation studied.
authors.affiliation: University of Nigeria, Enugu Campus, Medical Radiography and Radiological Sciences.
authors.forename: Charles Ugwoke
authors.initials: CU
authors.lastname: Eze
authors.affiliation: Central Hospital, Kwale, Delta State, Nigeria, Radiology.
authors.forename: Kester Ikechukwu
authors.initials: KI
authors.lastname: Egwuanumku
authors.affiliation: University of Nigeria, Enugu Campus, Radiation Medicine.
authors.forename: Kennedy Kenechukwu
authors.initials: KK
authors.lastname: Agwuna
authors.affiliation: Central Hospital, Kwale, Delta State, Nigeria, Obstetrics and Gynaecology.
authors.forename: Lazarus
authors.initials: L
authors.lastname: Odidi
authors.affiliation: University of Nigeria, Enugu Campus, Medical Radiography and Radiological Sciences.
authors.forename: Kalu
authors.initials: K
authors.lastname: Ochie
authors.affiliation: University of Nigeria, Enugu Campus, Medical Radiography and Radiological Sciences.
authors.forename: Innocent Uchechukwu
authors.initials: IU
authors.lastname: Nwadike
mesh_terms: D000328:Adult; D001724:Birth Weight; D005260:Female; D020567:Fetal Weight; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D015233:Models, Statistical; D009549:Nigeria; D011247:Pregnancy; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000379:methods* / Q000706:statistics & numerical data
keywords: Advanced Cyesis; Fetal Weight; Nigerian Population; Sonography; Validation
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