Conflict of interest The authors have stated explicitly that there are no conflicts of interest in connection with this article.
MAIN RESEARCH ARTICLE
Vacuum extraction: development and test of a procedure-specific rating scale
Article first published online: 1 NOV 2012
© 2012 The Authors Acta Obstetricia et Gynecologica Scandinavica© 2012 Nordic Federation of Societies of Obstetrics and Gynecology
Acta Obstetricia et Gynecologica Scandinavica
Volume 91, Issue 12, pages 1453–1459, December 2012
How to Cite
MAAGAARD, M., OESTERGAARD, J., JOHANSEN, M., ANDERSEN, L. L., RINGSTED, C., OTTESEN, B. and SØRENSEN, J. L. (2012), Vacuum extraction: development and test of a procedure-specific rating scale. Acta Obstetricia et Gynecologica Scandinavica, 91: 1453–1459. doi: 10.1111/j.1600-0412.2012.01526.x
Please cite this article as: Maagaard M, Oestergaard J, Johansen M, Andersen LL, Ringsted C, Ottesen B, Sørensen JL. Vacuum extraction: development and test of a procedure-specific rating scale. Acta Obstet Gynecol Scand 2012;91:DOI: 10.1111/j.1600-0412.2012.01526.x.
- Issue published online: 5 DEC 2012
- Article first published online: 1 NOV 2012
- Accepted manuscript online: 12 AUG 2012 05:20AM EST
- Received: 10 April 2012 Accepted: 1 August 2012
- clinical competence;
- medical education;
- vacuum extraction
Objectives. To develop and validate an Objective Structured Assessment of Technical Skills (OSATS) scale for vacuum extraction. Design. Two-part study design: Primarily, development of a procedure-specific checklist for vacuum extraction. Hereafter, validation of the developed OSATS scale for vacuum extraction in a prospective observational study. Setting. Rigshospitalet, University Hospital of Copenhagen. Population. For development, an obstetric expert from each labor ward in Denmark (28 departments) was invited to participate. For validation, nine first-year residents and 10 chief physicians with daily work in the obstetric field were tested. Methods. The Delphi method was used for development of the scale. In a simulated vacuum extraction scenario, first-year residents and obstetric chief physicians were rated using the developed OSATS scale for vacuum extraction to test construct validity of the scale. Main outcome measures. Consensus for the content of the scale. To test the scale of Cronbach's alpha, interclass correlation and differential item function was calculated in the prospective study. Results. 89% completed the first and 61% completed the second Delphi round. Hereafter, consensus was obtained. There was a significant difference between residents’ and experts’ performance for total score and for the score of the separate parts of the scale. Cronbach's alpha for total score and for the separate parts of the scale was 0.91–0.95 and interclass correlation 0.84–0.9. Conclusions. The OSATS scale for vacuum extraction is a reliable test for differentiating between competence levels in a simulated setting.