The PEDI (Pediatric Evaluation of Disability Inventory), is an interview-based assessment that can be used to monitor the self-care, mobility and social abilities of a person with cerebral palsy. In this assessment, the parent or care giver answers questions about the person’s performance in these aspects of life. There are two versions of this assessment widely used in clinical practice today:
The PEDI and PEDI-CAT can be used for newborns to 21-year-olds with a wide-range of developmental disabilities.
The PEDI and PEDI-CAT are questionnaires used to obtain information about a person from their parent or care giver in the following domains:
The responses on the questionnaire are scored on a four-point scale ranging from ‘unable’ to ‘easy’. These scores are then compared to other test subjects in the same age group to rate performance against the general population. The test is then performed again later on so the person’s progress can be measured over time.
The PEDI should be administered by a trained health professional, like an occupational therapist, who has experience using the assessment.
The PEDI-CAT can be administered by a trained health professional or a parent or caregiver, however the manual should always be reviewed beforehand to familiarise oneself with the assessment.
The manuals that are essential to administer the assessments can be purchased online:
The method will depend on whether the PEDI or PEDI-CAT is being used.
Construct validity – Several studies have assessed the concurrent validity of both the PEDI and the PEDI-CAT. The PEDI shows excellent concurrent validity with the Gross Motor Function Measure (GMFM)2,3 while the PEDI-CAT shows fair concurrent validity against the Alberta Infant Motor Scale (AIMS)4, and good results when assessed against the PEDI functional scale5. Both versions of the PEDI show adequate discriminant validity (t = 4.7-7.6, p = <0.0001). This means that the assessment can distinguish equally between those with and without disability6.
Reliability – Item-specific reliability (i.e. how reliable individual assessment items are) of the PEDI-CAT shows fair to excellent results (ICC = 3.4-1.0; percentage agreement 60-100%)5.
Reliability – Responsiveness has been reviewed on both versions of the assessment. The PEDI shows good results (effect size = > 0.5, SRM = >0.5) indicating that it is responsive to change7. The PEDI-CAT also shows good responsiveness to change (75% percentage change)4.
Date of literature searches: January 2017
The information on this page was developed using the best research evidence combined with the expertise of clinicians and people with cerebral palsy and their families. It is provided to help people with cerebral palsy, their families and caregivers, clinicians and service providers make decisions about suitable interventions. This information is intended to support, but not replace, information exchanged, and decisions made, between people with cerebral palsy, their families and health professionals.