Purpose: Life balance is a new and important concept in occupational therapy. New measurements are needed to assess and evaluate life balance and interventions aimed to achieve this concept. This article describes the test-retest reliability of three life balance measures: the Activity Calculator (AC), Activity Card Sort (ACS-NL(18-64)) and Occupational Balance Questionnaire (OBQ11-NL).
Method: Data collection took place among 50 participants with neuromuscular diseases: facioscapulohumeral dystrophy (FSHD, n = 25) or mitochondrial myopathy (MM, n = 25). The AC, the ACS-NL(18-64) and the OBQ11-NL were assessed twice with an interval of one week. Intraclass correlation coefficients (ICC-agreement) were applied to examine test-retest reliability.
Results: The ICC of the AC-average total day score was .95 (95% CI .91-.97), whereas the ICC of the weights allocated to each activity was 0.80 (95% CI .77-0.82). The ICC of the ACS-NL(18-64) percentage retained activities was 0.92 (95% CI 0.86 - 0.96) and the ICC of the importance score per activity was- .76 (95% CI . 0.68-0.89). The ICC of the OBQ11-NL total score was .76 (95% CI 0.62-0.86).
Conclusion: All three tools showed good to excellent test-retest reliability in a sample of patients with FSHD or MM, which is promising for its use in clinical practice and research.
Keywords: Life balance; activity calculator; activity card sort; fatigue; neuromuscular diseases; occupational balance questionnaire; outcome measures; test-retest reliability.
The AC, ACS-NL(18–64) and the OBQ11-NL are promising, reliable measures of life balance in patients with neuromuscular diseases.The development of three new instruments for life balance enlarges the possibility for health professionals to measure life balance in clinical practice and research.