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Interobserver reliability of the Turkish version of the expanded and revised gross motor function classification
Ozlem El1, Meltem Baydar, Haluk Berk
1Department of Physical Medicine and Rehabilitation, Dokuz Eylül University Faculty of Medicine, İzmir, Turkey. elozlem@yahoo.com
Insights
The Turkish version of the expanded and revised Gross Motor Function Classification System (GMFCS) is reliable for assessing children with cerebral palsy (CP). This study confirms its validity for Turkish CP patients.
Area of Science:
- Pediatrics
- Neurology
- Rehabilitation Medicine
Background:
- Cerebral palsy (CP) is the most prevalent childhood disability.
- The Gross Motor Function Classification System (GMFCS) is crucial for assessing motor function in CP patients.
- The expanded and revised (E&R) GMFCS, including an age band for adolescents (12-18 years), was developed in 2007.
Purpose of the Study:
- To evaluate the reliability and validity of the Turkish version of the expanded and revised GMFCS.
- To assess the suitability of the Turkish E&R GMFCS for clinical use in Turkey.
Main Methods:
- Interobserver reliability was assessed between two physical medicine and rehabilitation specialists.
- Test-retest reliability was evaluated in a subgroup of patients.
- Reliability was measured using percent agreement, intraclass correlation coefficient (ICC), and μ statistics.
Main Results:
- Excellent interobserver agreement was found, with an ICC of 0.97 and 89% total agreement.
- The overall weighted μ was 0.86.
- High test-retest reliability was demonstrated, with an ICC of 0.94 and 75% total agreement.
Conclusions:
- The Turkish version of the E&R GMFCS is a reliable and valid tool.
- This validated tool can be used for assessing Turkish children with CP.
Purpose:
Cerebral palsy (CP) is the most common disability in childhood. The gross motor function classification system (GMFCS) has become an important tool to assess motor function in CP patient. In 2007, the expanded and revised (E&R) version of GMFCS which includes age band for youth 12-18 years of age was developed. The aim of this study was to evaluate reliability of Turkish version of expanded and revised GMCS.
Methods:
We assessed interobserver reliability between two physical medicine and rehabilitation specialists in 136 children with CP and test-retest reliability within a subgroup of 48 patients. Percent agreement, intraclass correlation coefficient (ICC) and μ statistics were used to evaluate reliability.
Result:
The ICC between two physicians was 0.97 and the total agreement was 89%. This result indicates excellent agreement. The overall weighted μ was 0.86. High test-retest reliability was found (ICC: 0.94 95% confidence interval) and the total agreement was 75% for test-retest reliability.
Conclusion:
The Turkish version of the E&R GMFCS is shown to be reliable and valid for assessment of Turkish CP children.
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