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Accuracy of cervical assessment in the active phase of labour

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Objective

To determine accuracy of clinicians in estimating cervical dilatation during the active phase of labour and how this is affected by clinician experience and obstetric factors. Design

Prospective, cross-sectional, comparative study. Setting

Chris Hani Baragwanath Hospital labour ward, Johannesburg, South Africa. Population

Women at term in the active phase of labour, with vertex presentations and live fetuses. Methods

The researcher performed cervical assessment immediately after the clinician on duty. The researcher and clinician were unaware of each other’s findings. The researcher, used as the standard, was an experienced obstetric consultant, and the clinicians were hospital consultants and registrars at various levels of training. Accuracy was defined as agreement of the clinician’s cervical dilatation estimate with that of the researcher. Multivariate logistic regression analysis was carried out to determine independent predictors of inaccuracy. Main outcome measure

Agreement in estimation of cervical dilatation between the researcher and the clinicians. Results

Examinations were performed on 508 women. The researcher and clinicians agreed on the dilatation in 250 instances (49.2%) and differed by 2 cm or more in 56 (11.0%) (kappa = 0.40, 95% CI 0.34–0.45). Accuracy was greater at low (3–4 cm) and high (8–10 cm) dilatations. Reduced accuracy was associated with decreasing clinician experience and with lower stations of fetal head. Conclusion

This is the first study to investigate accuracy of cervical assessment in parturient women. Results were similar to those found in studies that used models, with about 90% of estimations accurate to within 1 cm.
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Keywords: Cervical dilatation; clinical skills; inter-observer agreement; intrapartum dilatation

Document Type: Research Article

Affiliations: Department of Cardiology, Chris Hani Baragwanath Hospital, University of the Witwatersrand, Johannesburg, South Africa

Publication date: 2007-07-01

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