Rheumatology Advance Access originally published online on February 28, 2003
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Rheumatology 2003; 42: 591-595
© 2003 British Society for Rheumatology
Paediatric Rheumatology |
The physiological and physical determinants of functional ability measures in children with juvenile dermatomyositis
Department of Pediatric Physical Therapy and
1 Department of Immunology, Wilhelmina Children's Hospital, University Medical Center Utrecht, The Netherlands
Abstract
Objective. To study the relationships of muscle strength and maximal oxygen consumption (VO2peak) with Childhood Health Assessment Questionnaire (CHAQ) score, Childhood Myositis Assessment Score (CMAS) and Child Health Questionnaire [physical summary (CHQ-PhS) and psychosocial summary (CHQ-PsS)] scores in juvenile dermatomyositis.
Method. Fifteen patients (age 514 yr) participated. CMAS, CHAQ, CHQ, muscle strength and VO2peak were measured.
Results. Correlations revealed significant relationships between CHAQ and (i) muscle strength (r=-0.72) and (ii) absolute VO2peak (r=-0.68); between CMAS and relative VO2peak (r=0.73); and between CHQ-PhS and (i) muscle strength (r=0.57) and (ii) relative VO2peak (r=0.58). Backward regression analysis showed that muscle strength was the best indicator of variation in CHAQ. Age and relative VO2peak were the best indicators for CMAS. Body mass and age were the best indicators for CHQ-PsS. Body mass and muscle strength were the best indicators for CHQ-PhS.
Conclusion. CMAS, CHAQ and CHQ correlate with muscle strength and VO2peak. CMAS, CHAQ and CHQ depend on different physical and physiological variables.
KEY WORDS: Physical fitness, Physical activity, Activities of daily living, Quality of life, Functional ability, Maximal oxygen consumption, Muscle strength, Exercise tolerance, Endurance.
Notes
Correspondence to: T. Takken, Department of Pediatric Physical Therapy, Wilhelmina Children's Hospital, University Medical Center Utrecht, Room KB2.056.0, PO Box 85090, NL 3508 GA Utrecht, The Netherlands. E-mail: t.takken{at}wkz.azu.nl
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