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Published on: January 11, 2016
Reliability of classification of cerebral palsy in low-birthweight children in four countries
Nigel Paneth1, Hong Qiu, Peter Rosenbaum
1Department of Epidemiology, College of Human Medicine, Michigan State University, USA. paneth@msu.edu
Insights
Classifying cerebral palsy (CP) in low-birthweight children is more reliable when detailed motor function is considered. Distinguishing disabling CP from non-disabling CP or no CP improves diagnostic accuracy.
Area of Science:
- Neurology
- Pediatrics
- Epidemiology
Background:
- Accurate classification of cerebral palsy (CP) is crucial for epidemiological studies and clinical management.
- Low-birthweight infants are at higher risk for CP, necessitating reliable diagnostic methods.
- Previous classifications may lack precision in differentiating CP severity.
Purpose of the Study:
- To assess the reliability of cerebral palsy classification in low-birthweight children.
- To evaluate the impact of detailed motor function information on diagnostic agreement.
- To compare the reliability of distinguishing 'any CP' versus 'no CP' with differentiating CP severity.
Main Methods:
- Utilized clinical and research records from population-based cohort studies in the USA, The Netherlands, Canada, and Germany.
- Pediatricians with CP expertise classified children (aged 2-8 years) into 'disabling' CP, 'non-disabling' CP, and no CP categories.
- Analyzed neurological examination findings and functional motor assessments using Kappa coefficients to measure inter-rater reliability.
Main Results:
- The discrimination between 'any CP' and 'no CP' showed only fair reliability (mean Kappa: 0.37–0.69).
- However, incorporating detailed motor function descriptions significantly improved reliability.
- Distinguishing 'disabling' CP from other groups achieved good to excellent reliability (mean Kappa: 0.69–0.88).
Conclusions:
- Detailed motor function assessment substantially enhances the reliability of cerebral palsy classification in low-birthweight children.
- Reporting CP rates should include motor function levels for more accurate comparisons.
- Future research and clinical practice should prioritize functional assessments for precise CP diagnosis.
Abstract:
The reliability of classification of cerebral palsy (CP) in low-birthweight children was assessed by using clinical and research study records sampled from population-based cohort studies in the USA, The Netherlands, Canada, and Germany. Records of neurological examination findings and functional motor assessments were submitted to up to five pediatricians with expertise in CP diagnosis, who grouped children into categories referred to as 'disabling' CP, 'non-disabling' CP, and no CP. Each study provided between 31 and 51 records of children assessed between 2 and 8 years of age, approximately equally divided among the three groupings. The discrimination between 'any CP' and 'no CP' was only fair (mean Kappa coefficients 0.37 to 0.69). However, when more detailed information describing motor function was used, children with 'disabling' CP could be distinguished, on the basis of records, from those without CP or with 'non-disabling' CP with good to excellent reliability (mean Kappa coefficients 0.69 to 0.88). Because of the substantially higher agreement observed when these functional distinctions are made, we recommend that reports or comparisons of rates of CP should include levels of motor function of children with CP, and not simply total CP, among the outcomes of interest.
