Document Detail

Reliability and validity of two methods of three-dimensional cervical volume measurement.
MedLine Citation:
PMID:  12858303     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To determine if cervical length obtained with three-dimensional ultrasound correlated with the 'true cervical volume' and to evaluate the reliability and validity of transabdominal and transvaginal three-dimensional cervical volume measurement. METHODS: This was a prospective observational study. Three-dimensional cervical volume measurements were made prior to hysterectomy in 28 women. Following hysterectomy the amputated cervical volume was calculated using water displacement. For the assessment of intra- and interobserver reliability, the intraclass correlation coefficient (ICC) was used. The index of concordance between the sonographic cervical volumes and those obtained by the reference standard (true cervical volume) was assessed with the limits of agreement method and the ICC. RESULTS: Transabdominal cervical length and transvaginal cervical length correlated moderately with actual cervical volume; correlation coefficients were 0.64 and 0.57 (P < 0.05), respectively. Intraobserver reliability for both transabdominal and transvaginal cervical volume assessment was good (> 0.75). Interobserver reliability for transvaginal cervical volumes was similarly good (ICC = 0.90). However, for transabdominal measurements the interobserver reliability was poor (ICC = 0.51). The validity of both methods of three-dimensional volume assessment was poor (ICC < 0.75). This was reflected in the wide limits of agreement, which ranged from approximately - 25 mL to + 30 mL. CONCLUSION: The reliability and validity of three-dimensional cervical volume measurement are poor. Clinical introduction of cervical volume measurement should be avoided at this time.
T Farrell; M Cairns; J Leslie
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Publication Detail:
Type:  Comparative Study; Journal Article; Validation Studies    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  22     ISSN:  0960-7692     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-07-14     Completed Date:  2003-10-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  49-52     Citation Subset:  IM    
Copyright Information:
Copyright 2003 ISUOG. Published by John Wiley & Sons, Ltd.
Department of Obstetrics & Gynaecology, Ninewells Hospital, Dundee, Scotland, UK.
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MeSH Terms
Cervix Uteri / anatomy & histology,  ultrasonography*
Imaging, Three-Dimensional
Observer Variation
Prospective Studies
Reference Values
Reproducibility of Results
Sensitivity and Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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