Reliability and Validity of Self-measured Arm Circumference in Women With Breast Cancer
Study Overview
Status
Conditions
Detailed Description
Purpose: to test the reliability and validity of self-measured arm circumference compared to measures performed by a specialized therapist and by the perometer (gold standard).
The hypothesis is that there will be an excellent correlation between arm circumference measures performed by the participant and by an experienced physiotherapist and a moderate correlation between arm circumference measures performed by the patient and determined by perometer, as well as arm volume calculated from arm circumference measurements and measured by the perometer.
Design: A cross-sectional study of women at risk of breast cancer-related lymphedema (BCRL) (n=20) and with BCRL (n=20)
Procedures: Participants will complete one self-assessment at home and one self-assessment at a laboratory the University of British Columbia (UBC).
Home Self-assessment: Participants will be sent a study package by mail, which will contain the consent form, a tape measure, written instructions supplemented with illustrations, a link for a video guide, and a measurement form, along with an opaque envelop for the measurement form. Participants will be asked to first review the written and video material outlining the measurement process, prior to completing a short self-assessment quiz on the self-measurement technique. Participants will then perform arm circumference measures of both arms as per the instructions, record the measurements on the provided form and seal the form in a provided envelope. The envelope will be returned to the study team at the lab assessment.
Lab Self-assessment: At the visit at UBC, participants will be asked by study staff to repeat these arm circumference measures with support from the video and written instructions, unsupervised by a physiotherapist. This will be followed by an assessment by the physiotherapist and measures with the perometer.
Statistical analysis plan: Intra-rater (between self-measures performed at home and at the lab), inter-rater reliability (between self-measures performed at lab and therapist-measures) and concurrent validity analysis (between self-measures performed at lab and perometer measures) will be conducted separately for women with and without BCRL.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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British Columbia
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Vancouver, British Columbia, Canada, V6T 1Z4
- University of British Columbia
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- women, who have received surgery for breast cancer with axillary or sentinel lymph node dissection within the last 3 months to 5 years, including those who are undergoing chemotherapy or radiation
- with and without a clinical diagnosis of BCRL in one or two arms
- age 18 to 80 years
- who can understand the self-measurement instructions given in English
- who have access and ability to use internet to view the self-measurement video tutorial
Exclusion Criteria:
-
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
|
Experimental: Women with breast cancer-related lymphedema
Participants will measure their own arm circumference and be measured by a specialized physiotherapist and by a perometer.
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|
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Experimental: Women at risk of breast cancer-related lymphedema
Participants will measure their own arm circumference and be measured by a specialized physiotherapist and by a perometer.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Intra-class correlation coefficients (ICC) for intra-rater reliability of self-measured arm circumference
Time Frame: Self-measures performed twice with 2 days apart
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ICC is scored from 0 to 1. Reliability is considered poor when the ICC < 0.40, moderate between 0.40 and 0.75, substantial between 0.75 and 0.90, and excellent when >0.90.
The total agreement between self-measured arm circumference performed twice by the participant will be calculated.
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Self-measures performed twice with 2 days apart
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Intra-class correlation coefficients (ICC) for inter-rater reliability between arm circumference measures performed by the participant herself and by the therapist.
Time Frame: Both measures are performed same day within one hour
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The total agreement between self-measured arm circumference performed by the participant and by a physiotherapist will be calculated.
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Both measures are performed same day within one hour
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Intra-class correlation coefficients (ICC) for concurrent validity of self-measured arm circumference and perometer-measures
Time Frame: Both measures are performed same day within one hour
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The total agreement between self-measured arm circumference performed by the participant and by a perometer will be calculated.
|
Both measures are performed same day within one hour
|
Collaborators and Investigators
Sponsor
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- H16-00961
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