BMJ  2006;333:578-580 (16 September), doi:10.1136/bmj.38919.681563.4F (published 4 August 2006)

Research

Diagnostic accuracy of clinical examination for detection of non-cephalic presentation in late pregnancy: cross sectional analytic study

¹ Centre for Perinatal Health Services Research, School of Public Health, University of Sydney NSW 2006, Australia

Abstract

Objective To examine the diagnostic accuracy of clinical examination to determine fetal presentation in late pregnancy.

Design Cross sectional analytic study with index test of clinical examination and reference standard of ultrasonography.

Setting Antenatal clinic in tertiary obstetric hospital in Sydney, Australia.

Participants 1633 women with a singleton pregnancy between 35 and 37 weeks' gestation attending antenatal clinics.

Intervention Fetal presentation assessed by clinical examination during routine antenatal care, followed by ultrasonography to confirm the diagnosis.

Main outcome measures Sensitivity, specificity, and positive and negative predictive values of clinical examination compared with ultrasonography. Diagnostic rates by maternal characteristics.

Results Ultrasonography identified non-cephalic presentation in 130 (8%) women, comprising 103 (6.3%) with breech and 27 (1.7%) with transverse or oblique lie. Sensitivity of clinical examination for detecting non-cephalic presentation was 70% (95% confidence interval 62% to 78%) and specificity was 95% (94% to 96%). The positive predictive value and negative predictive value were55% and 97%, respectively.

Conclusions Clinical examination is not sensitive enough for detection and timely management of non-cephalic presentation.

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