The Journal of Bone and Joint Surgery (American). 2009;91:41-49.
doi:10.2106/JBJS.H.01551
© 2009 The Journal of Bone and Joint Surgery, Inc.
Outcome Instruments: Rationale for Their Use
Rudolf W. Poolman, MD, PhD1,
Marc F. Swiontkowski, MD2,
Jeremy C.T. Fairbank, MD, FRCS3,
Emil H. Schemitsch, MD, FRCSC4,
Sheila Sprague, MSc5 and
Henrica C.W. de Vet, PhD6
1 Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis, Postbus 95500, 1090 HM Amsterdam, The Netherlands. E-mail address: poolman{at}trauma.nl
2 Department of Orthopaedic Surgery, University of Minnesota Medical Center, 2450 Riverside Avenue South, Minneapolis, MN 55454
3 Department of Orthopaedic Surgery, Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford OX3 7LD, United Kingdom
4 Division of Orthopaedics, Department of Surgery, St. Michael's Hospital, 55 Queen Street East, Suite 800, Toronto, ON M5C 1R6, Canada
5 Department of Clinical Epidemiology and Biostatistics, McMaster University, 293 Wellington Street North, Suite 110, Hamilton, ON L8L 8E7, Canada
6 EMGO Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
Disclosure: In support of their research for or preparation of this work, one or more of the authors received, in any one year, outside funding or grants in excess of $10,000 from the National Institute of Child Health and Human Development (NICHD). Neither they nor a member of their immediate families received payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity.
The number of outcome instruments available for use in orthopaedic observational studies has increased dramatically in recent years. Properly developed and tested outcome instruments provide a very useful tool for orthopaedic research. Criteria have been proposed to assess the measurement properties and quality of health-status instruments. Unfortunately, not all instruments are developed with use of strict quality criteria. In this article, we discuss these quality criteria and provide the reader with a tool to help select the most appropriate instrument for use in an observational study. We also review the steps for future use of outcome instruments, including the standardization of their use in orthopaedic research.

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