The association between biopsychosocial factors and disability in a national health survey in South Africa
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The association between psychosocial factors and disability is less clear. This study investigated the biological and psychosocial (employment and psychological distress) factors associated with level of disability in an adult sample in South Africa. Data were analysed from a cross-sectional survey among adults aged 18???64.
Multiple linear regression was used to investigate the associations of the selected variables with disability. The mean percentage score on the WHODAS scale of disability was 5.31% (95% CI: 4.74???5.88). Age and race were significantly associated with disability, and history of stroke and heart-related conditions showed positive associations. Of the psychosocial variables, psychological distress showed a strong positive association
while employment showed a negative association with disability. The association between demographic
factors, medical conditions and increased disability confirms the findings in the literature. The finding that psychological distress is associated with increased disability has not been frequently reported. This study highlights specific psychosocial targets that may be usefully addressed by health policies and interventions in order to improve disability management.