Mini-MACS: development of the Manual Ability Classification System for children younger than 4 years of age with signs of cerebral palsy.
To develop the Mini-Manual Ability Classification System (Mini-MACS) and to evaluate the extent to which its ratings are valid and reliable when children younger than 4 years are rated by their parents and therapists.



The Mini-MACS was created by making adjustments to the MACS. The development involved a pilot project, consensus discussions within an expert group, and the creation of a test version of the Mini-MACS that was evaluated for content validity and interrater reliability. A convenience sample of 61 children with signs of cerebral palsy aged 12 to 51 months (mean age 30.2mo [SD 10.1]) were classified by one parent and two occupational therapists across a total of 64 assessments. Agreement between the parents' and therapists' ratings was evaluated using the intraclass correlation coefficient (ICC) and the percentage of agreement.



The first sentence of the five levels in the MACS was kept, but other descriptions within the Mini-MACS were adjusted to be more relevant for the younger age group. The ICC between parents and therapists was 0.90 (95% confidence interval [CI] 0.79-0.92), and for the two therapists it was 0.97 (95% CI 0.78-0.92). Most parents and therapists found the descriptions in the Mini-MACS suitable and easy to understand.



The Mini-MACS seems applicable for children from 1 to 4 years of age.
Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
Ann-Christin
AC
Eliasson
Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
Anna
A
Ullenhag
Children and Youth's Habilitation Centre, Linköping, Sweden.
Ulla
U
Wahlström
Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
Lena
L
Krumlinde-Sundholm
D000367:Age Factors; D002547:Cerebral Palsy / Q000145:classification / Q000503:physiopathology* / Q000534:rehabilitation; D002675:Child, Preschool; D004185:Disability Evaluation; D005260:Female; D006225:Hand / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D000072087:Occupational Therapists / Q000523:psychology; D010290:Parents / Q000523:psychology; D010865:Pilot Projects; D015203:Reproducibility of Results