Normal scores for nine maneuvers of the Childhood Myositis Assessment Scale

Arthritis Rheum. 2004 Jun 15;51(3):365-70. doi: 10.1002/art.20397.


Objective: To document and evaluate the scores that normal, healthy children achieve when performing 9 maneuvers of the Childhood Myositis Assessment Scale (CMAS).

Methods: A total of 303 healthy children, 4-9 years of age, were scored as they performed 9 CMAS maneuvers. The data were then evaluated to determine whether normal scores for some maneuvers are age and sex dependent.

Results: All children were able to achieve maximum possible scores for the supine to prone, supine to sit, floor sit, floor rise, and chair rise maneuvers. All but 2 4-year-olds achieved a maximum possible score for the arm raise/duration maneuver. Performance of the head lift and sit-up maneuvers varied significantly, depending primarily on age. Children in all age groups had less difficulty performing the leg lift than the head lift or sit-up.

Conclusion: The normative data generated by this study are of value for interpreting the serial CMAS scores of children with idiopathic inflammatory myopathies.

MeSH terms

  • Child
  • Child, Preschool
  • Disability Evaluation*
  • Female
  • Head / physiology
  • Humans
  • Leg / physiology
  • Male
  • Movement
  • Muscle, Skeletal / physiology*
  • Myositis / diagnosis*
  • Myositis / physiopathology
  • ROC Curve
  • Reference Values
  • Severity of Illness Index*