Inter-observer variability in fetal biometric measurements.

Abstract:

OBJECTIVE:To evaluate inter-observer variability and reproducibility of ultrasound measurements for fetal biometric parameters. MATERIALS AND METHODS:A prospective cohort study was implemented in two tertiary care hospitals in Amman, Jordan; Prince Hamza Hospital and Albashir Hospital. 192 women with a singleton pregnancy at a gestational age of 18-36 weeks were the participants in the study. Transabdominal scans for fetal biometric parameter measurement were performed on study participants from the period of November 2014 to March 2015. Women who agreed to participate in the study were administered two ultrasound scans for head circumference, abdominal circumference and femur length. The correlation coefficient was calculated. Bland-Altman plots were used to analyze the degree of measurement agreement between observers. Limits of agreement ± 2 SD for the differences in fetal biometry measurements in proportions of the mean of the measurements were derived. Main outcome measures examine the reproducibility of fetal biometric measurements by different observers. RESULTS:High inter-observer inter-class correlation coefficient (ICC) was found for femur length (0.990) and abdominal circumference (0.996) where Bland-Altman plots showed high degrees of agreement. The highest degrees of agreement were noted in the measurement of abdominal circumference followed by head circumference. The lowest degree of agreement was found for femur length measurement. We used a paired-sample t-test and found that the mean difference between duplicate measurements was not significant (P > 0.05). CONCLUSION:Biometric fetal parameter measurements may be reproducible by different operators in the clinical setting with similar results. Fetal head circumference, abdominal circumference and femur length were highly reproducible. Large organized studies are needed to ensure accurate fetal measurements due to the important clinical implications of inaccurate measurements.

authors

Kilani R,Aleyadeh W,Atieleh LA,Al Suleimat AM,Khadra M,Hawamdeh HM

doi

10.1016/j.tjog.2017.12.006

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

32-39

issue

1

eissn

1028-4559

issn

1875-6263

pii

S1028-4559(17)30300-5

journal_volume

57

pub_type

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