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Published on: May 8, 2014
The measurement properties of the IKDC-subjective knee form
Hanna Tigerstrand Grevnerts1, Caroline B Terwee2, Joanna Kvist3
1Division of Physiotherapy, Department of Medical and Health Sciences, Linköping University, 581 83, Linköping, Sweden.
Purpose:
To evaluate the methodological quality of studies reporting on the measurement properties of the International Knee Documentation Committee subjective knee form (IKDC-SKF) and to evaluate their results following the COnsensus-based Standards for the selection of health status Measurement INstruments (COSMIN) guidelines.
Methods:
Systematic search of articles published about the measurement properties of the IKDC-SKF, review of the studies' methodological quality, and synthesis of the results using the COSMIN guidelines.
Results:
Twenty-six studies were identified and reviewed. There was strong evidence for good internal consistency, test-retest reliability, and responsiveness. There was moderate evidence for good content and structural validity. With the SF36 as a gold standard, the level of evidence for criterion validity was indeterminate. There was conflicting evidence for hypothesis testing and not enough evidence to evaluate measurement error and cross-cultural validity. There were no floor or ceiling effects.
Conclusions:
This review shows that the IKDC-SKF is a measurement instrument with good internal consistency, test-retest reliability, content and structural validity, and responsiveness and interpretability (no floor and ceiling effects). Further evaluation of measurement error, minimal important change, and hypotheses testing is recommended. The IKDC-SKF seems to be useful as a general instrument for all kinds of knee injuries, which might facilitate its clinical use in situations in which time is a factor.
Level Of Evidence:
Systematic review, Level III.
