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Title
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Reliability and validity of a Dutch Lymphoedema Questionnaire: Cross-cultural validation of the Norman Questionnaire
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Author
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Abstract
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| Objective To perform the cross-cultural validation process of the Dutch Norman Questionnaire (NQ), a questionnaire for the detection and characterisation of breast-cancer related lymphoedema (BCRL) using self-reported signs and symptoms. Methods Test-retest reliability and construct (including convergent, divergent and known-groups validity), face and content validity were examined in breast cancer patients with (n = 30) and without (n = 30) lymphoedema. For concurrent validity, first, agreement between the diagnostic item of the NQ and a clinical diagnosis were analysed. Second, correlations between NQ scores and clinical arm volume assessment were tested. Results Test-retest reliability was found to be strong to very strong (ICC 0.79-0.96) in the lymphoedema group and moderate to very strong ( ICC 0.64-0.99) in the non-lymphoedema group. Seventeen out of 20 hypotheses on convergent and divergent validity were accepted. There was good face, content and known-groups validity as well. For concurrent validity, agreement between evaluation methods was only 0.462. Moderate correlations were found between 6 out of 9 symptom scores (r = 0.422-0.630) of the NQ and clinical assessment. Conclusion The Dutch NQ is a reliable and valid questionnaire for the characterisation of BCRL using self-reported signs and symptoms. Only moderate agreement for the detection of BCRL was found. |
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Language
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English
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Source (journal)
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European journal of cancer care. - Oxford
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Publication
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Hoboken
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Wiley
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2020
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ISSN
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0961-5423
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DOI
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10.1111/ECC.13242
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Volume/pages
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p. 1-14
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Article Reference
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e13242
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ISI
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000532690600001
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Pubmed ID
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32410258
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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