TY - JOUR
T1 - Sonographic fetal weight estimation in normal and overweight/obese healthy term pregnant women by gestation-adjusted projection (GAP) method
AU - Paganelli, Simone
AU - Soncini, Emanuele
AU - Comitini, Giuseppina
AU - Palomba, Stefano
AU - La Sala, Giovanni Battista
PY - 2016/4/1
Y1 - 2016/4/1
N2 - Purpose: The objective of this study is to assess the ultrasound accuracy in fetal weight estimation related to the time distance between the actual weight recorded at delivery and the period of sonography among normal and overweight/obese pregnant women within 3 weeks prior birth at term. Methods: Four-hundred and ninety patients with healthy pregnancy were studied in a cohort study. The absolute percent error in estimation was achieved by gestation-adjusted projection method from Hadlock model for weight calculation as measure of accuracy. The mean percentage error variation over the weeks was correlated to maternal body mass index (BMI, Kg/m2) at ultrasound. The relationship between BMI and ultrasound performance was assessed by linear regression. Results: The overall proportion of supposed sonographic estimated fetal weight at birth within ±10 % of the birth weight significantly declines over the weeks (P = .016). The trend toward a progressive deterioration in ultrasound accuracy is not statistically significant for normal weight women (P = .272) but it is for over-weight/obese (P = .044). On univariate analysis, the absolute percent error and absolute error are positively related to BMI. Conclusions: Accuracy is related to the week at ultrasound scan with a gradual deterioration over the time and it worsens with increasing distance in days between the date of ultrasounds and delivery. The deterioration is greater for BMI ≥ 25.
AB - Purpose: The objective of this study is to assess the ultrasound accuracy in fetal weight estimation related to the time distance between the actual weight recorded at delivery and the period of sonography among normal and overweight/obese pregnant women within 3 weeks prior birth at term. Methods: Four-hundred and ninety patients with healthy pregnancy were studied in a cohort study. The absolute percent error in estimation was achieved by gestation-adjusted projection method from Hadlock model for weight calculation as measure of accuracy. The mean percentage error variation over the weeks was correlated to maternal body mass index (BMI, Kg/m2) at ultrasound. The relationship between BMI and ultrasound performance was assessed by linear regression. Results: The overall proportion of supposed sonographic estimated fetal weight at birth within ±10 % of the birth weight significantly declines over the weeks (P = .016). The trend toward a progressive deterioration in ultrasound accuracy is not statistically significant for normal weight women (P = .272) but it is for over-weight/obese (P = .044). On univariate analysis, the absolute percent error and absolute error are positively related to BMI. Conclusions: Accuracy is related to the week at ultrasound scan with a gradual deterioration over the time and it worsens with increasing distance in days between the date of ultrasounds and delivery. The deterioration is greater for BMI ≥ 25.
KW - Estimated fetal weight accuracy
KW - Fetal weight formulas
KW - Hadlockfetal weight
KW - Obesity
KW - Sonographicfetal weight estimation
KW - Ultrasound estimated fetal weight
KW - Ultrasound fetal weight
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U2 - 10.1007/s00404-015-3910-z
DO - 10.1007/s00404-015-3910-z
M3 - Article
C2 - 26482584
AN - SCOPUS:84961209939
VL - 293
SP - 775
EP - 781
JO - Archives of Gynecology
JF - Archives of Gynecology
SN - 0170-9925
IS - 4
ER -