Journal
INTENSIVE CARE MEDICINE
Volume 36, Issue 6, Pages 1038-1043Publisher
SPRINGER
DOI: 10.1007/s00134-010-1796-6
Keywords
Diagnostic techniques and procedures; Epidemiologic research design; Muscle strength; Muscle weakness; Physical examination; Reproducibility of results
Categories
Funding
- National Institutes of Health [P050 HL 73994]
- Canadian Institutes of Health Research
- Royal College of Physicians and Surgeons of Canada
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The goal of the paper is to determine inter-rater reliability of trained examiners performing standardized strength assessments using manual muscle testing (MMT). The authors report on 19 trainees undergoing quality assurance within a multi-site prospective cohort study. Inter-rater reliability for specially trained evaluators (trainees) and a reference rater, performing MMT using both simulated and actual patients recovering from critical illness was evaluated. Across 26 muscle groups tested by 19 trainee-reference rater pairs, the median (interquartile range) percent agreement and intraclass correlation coefficient (ICC; 95% CI) were: 96% (91, 98%) and 0.98 (0.95, 1.00), respectively. Across all 19 pairs, the ICC (95% CI) for the overall composite MMT score was 0.99 (0.98-1.00). When limited to actual patients, the ICC was 1.00 (95% CI 0.99-1.00). The agreement (kappa; 95% CI) in detecting clinically significant weakness was 0.88 (0.44-1.00). MMT has excellent inter-rater reliability in trained examiners and is a reliable method of comprehensively assessing muscle strength.
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