WHO disability assessment schedule 2.0 is related to upper and lower extremity disease-specific quality of life
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We evaluated whether two disease-specific quality of life instruments (Disabilities of the Arm, Shoulder and Hand, DASH and Western Ontario & McMaster Universities Osteoarthritis Index, WOMAC) reflect a patient’s perception of general disability using the WHO Disability Assessment Schedule 2.0 (WHODAS 2.0) and determined whether disability components are explained by upper and lower extremity HRQOL.
We recruited 421 participants, 50 years or older without stroke, cancer, or history of surgery for musculoskeletal disease, who participated in the NAMGARAM Cohort. Upper extremity HRQOL was determined with the DASH score and lower extremity HRQOL with the WOMAC; as a measure of disability, we obtained WHODAS 2.0 component. Multiple regression modeling was used to assess the relative contributions made by upper and lower extremity HRQOL to disability.
When adjusted for covariates, the DASH total score was correlated with getting around (β = 0.217, p < 0.001) and social participation (β = 0.226, p < 0.001), and the WOMAC total score was correlated with getting around (β = 0.363, p < 0.001), life activation (β = 0.363, p < 0.001), and social participation (β = 0.301, p < 0.001). QOL significantly correlated with upper extremity disorders (β = 0.081, p = 0.018) or lower extremity disorders (β = 0.095 p = 0.004).
We found that in a community-based population, perceived activity limitation and social participation were associated with upper and lower extremity HRQOL. Since the WHODAS 2.0 does not target a specific disease (as opposed to DASH and WOMAC), it can be used to compare disabilities caused by different diseases.
KeywordsDisability Lower extremity Quality of life Upper extremity WHO
This study was supported by a grant of the Center for Farmer’s Safety and Health, Ministry of Agriculture, Food and Rural Affairs, Republic of Korea.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
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