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Inter-rater reliability of arm circumference measurement
Nasim Foroughi1, Elizabeth S Dylke, Ross D Paterson
1Clinical and Rehabilitation Sciences, Breast Cancer Research Group, Faculty of Health Sciences, University of Sydney , Sydney, NSW, Australia .
Lymphatic Research and Biology
|June 22, 2011
Summary
A new protocol allows individuals to reliably measure arm circumference at home, showing good agreement with professional assessments. This empowers patients to monitor lymphedema independently.
Area of Science:
- Lymphedema Management
- Biomedical Measurement
- Patient-Reported Outcomes
Background:
- Arm lymphedema assessment commonly relies on clinical arm circumference measurements.
- A novel protocol was developed for self-measurement of arm circumference by non-medical professionals.
- The study aimed to validate this protocol against established methods.
Purpose of the Study:
- To assess the inter-rater reliability of a new arm circumference measurement protocol.
- To evaluate the coherence of the protocol with perometry measures.
- To determine the reliability of self-administered arm circumference measurements.
Main Methods:
- A protocol for measuring arm circumference using a tape measure was developed.
- Measurements were taken by a trained assessor, a participant's friend, and a perometer.
- Data were collected from 57 community-dwelling adults aged 60.2 ± 12.8 years.
Main Results:
- The protocol demonstrated moderate to high concordance with perometry (r(c)=0.68-0.94).
- Inter-rater reliability between assessor and participant measurements showed good agreement.
- Bias analysis indicated acceptable differences across measurement locations.
Conclusions:
- The developed protocol, including written instructions and cartoons, is a reliable tool for arm circumference measurement.
- This method enables reliable self-monitoring of arm circumference by individuals at risk or with lymphedema.
- Empowers patients, particularly breast cancer survivors, to manage lymphedema independently.
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