Impact of maternal weight on the intra-observer and inter-observer reproducibility of fetal ultrasonography measurements in the third trimester

Catarina Policiano, Jorge M. Mendes, Andreia Fonseca, Joana Barros, Diana Martins, Inês Reis, Nuno Clode, Luís M. Graça

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objective: To evaluate the effect of maternal weight on the intra- and inter-observer reproducibility of third-trimester ultrasonography fetal measurements. Methods: The present prospective study, performed at a tertiary hospital, enrolled patients at between 35+0 weeks and 36+6 weeks of singleton pregnancies between January 1, 2015, and July 1, 2016. Fetal ultrasonography measurements were evaluated twice by a first observer and a third time by a second observer. Intra- and inter-observer consistency were analyzed using the Cronbach α reliability coefficient, and measurement reproducibility was compared with patients stratified by a body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) of below 25 or at least 25. Results: The study included 197 patients (133 with BMI <25 and 64 with BMI ≥25). Among patients with a BMI below 25, the reliability coefficients for bi-parietal diameter, head circumference, abdominal circumference, and femur length measurements were 0.97, 0.95, 0.98, and 0.96, respectively, for intra-observer consistency, and were 0.97, 0.93, 0.98, and 0.95, respectively, for inter-observer consistency. Among patients with a BMI of at least 25, these values were 0.97, 0.96, 0.98, and 0.97, respectively, for intra-observed consistency, and 0.97, 0.94, 0.98, and 0.96, respectively, for inter-observer consistency. Conclusion: High intra- and inter-observer reproducibility was observed for third-trimester fetal ultrasonography measurements, including for patients who were overweight.

Original languageEnglish
Pages (from-to)53-59
Number of pages7
JournalInternational Journal of Gynecology and Obstetrics
Volume140
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Prenatal Ultrasonography
Third Pregnancy Trimester
Mothers
Weights and Measures
Tertiary Care Centers
Femur
Body Mass Index
Head
Prospective Studies
Pregnancy

Keywords

  • Fetal biometry
  • Intra- and inter-observer reproducibility
  • Obesity
  • Third trimester ultrasound

Cite this

Policiano, Catarina ; Mendes, Jorge M. ; Fonseca, Andreia ; Barros, Joana ; Martins, Diana ; Reis, Inês ; Clode, Nuno ; Graça, Luís M. / Impact of maternal weight on the intra-observer and inter-observer reproducibility of fetal ultrasonography measurements in the third trimester. In: International Journal of Gynecology and Obstetrics. 2018 ; Vol. 140, No. 1. pp. 53-59.
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Impact of maternal weight on the intra-observer and inter-observer reproducibility of fetal ultrasonography measurements in the third trimester. / Policiano, Catarina; Mendes, Jorge M.; Fonseca, Andreia; Barros, Joana; Martins, Diana; Reis, Inês; Clode, Nuno; Graça, Luís M.

In: International Journal of Gynecology and Obstetrics, Vol. 140, No. 1, 01.01.2018, p. 53-59.

Research output: Contribution to journalArticle

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T1 - Impact of maternal weight on the intra-observer and inter-observer reproducibility of fetal ultrasonography measurements in the third trimester

AU - Policiano, Catarina

AU - Mendes, Jorge M.

AU - Fonseca, Andreia

AU - Barros, Joana

AU - Martins, Diana

AU - Reis, Inês

AU - Clode, Nuno

AU - Graça, Luís M.

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Y1 - 2018/1/1

N2 - Objective: To evaluate the effect of maternal weight on the intra- and inter-observer reproducibility of third-trimester ultrasonography fetal measurements. Methods: The present prospective study, performed at a tertiary hospital, enrolled patients at between 35+0 weeks and 36+6 weeks of singleton pregnancies between January 1, 2015, and July 1, 2016. Fetal ultrasonography measurements were evaluated twice by a first observer and a third time by a second observer. Intra- and inter-observer consistency were analyzed using the Cronbach α reliability coefficient, and measurement reproducibility was compared with patients stratified by a body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) of below 25 or at least 25. Results: The study included 197 patients (133 with BMI <25 and 64 with BMI ≥25). Among patients with a BMI below 25, the reliability coefficients for bi-parietal diameter, head circumference, abdominal circumference, and femur length measurements were 0.97, 0.95, 0.98, and 0.96, respectively, for intra-observer consistency, and were 0.97, 0.93, 0.98, and 0.95, respectively, for inter-observer consistency. Among patients with a BMI of at least 25, these values were 0.97, 0.96, 0.98, and 0.97, respectively, for intra-observed consistency, and 0.97, 0.94, 0.98, and 0.96, respectively, for inter-observer consistency. Conclusion: High intra- and inter-observer reproducibility was observed for third-trimester fetal ultrasonography measurements, including for patients who were overweight.

AB - Objective: To evaluate the effect of maternal weight on the intra- and inter-observer reproducibility of third-trimester ultrasonography fetal measurements. Methods: The present prospective study, performed at a tertiary hospital, enrolled patients at between 35+0 weeks and 36+6 weeks of singleton pregnancies between January 1, 2015, and July 1, 2016. Fetal ultrasonography measurements were evaluated twice by a first observer and a third time by a second observer. Intra- and inter-observer consistency were analyzed using the Cronbach α reliability coefficient, and measurement reproducibility was compared with patients stratified by a body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) of below 25 or at least 25. Results: The study included 197 patients (133 with BMI <25 and 64 with BMI ≥25). Among patients with a BMI below 25, the reliability coefficients for bi-parietal diameter, head circumference, abdominal circumference, and femur length measurements were 0.97, 0.95, 0.98, and 0.96, respectively, for intra-observer consistency, and were 0.97, 0.93, 0.98, and 0.95, respectively, for inter-observer consistency. Among patients with a BMI of at least 25, these values were 0.97, 0.96, 0.98, and 0.97, respectively, for intra-observed consistency, and 0.97, 0.94, 0.98, and 0.96, respectively, for inter-observer consistency. Conclusion: High intra- and inter-observer reproducibility was observed for third-trimester fetal ultrasonography measurements, including for patients who were overweight.

KW - Fetal biometry

KW - Intra- and inter-observer reproducibility

KW - Obesity

KW - Third trimester ultrasound

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DO - 10.1002/ijgo.12333

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