This study examined quality-of-life (QOL) evaluations among people with epilepsy and mild intellectual disabilities in residential care to determine their covariation and potential determinants. Participants were 111 clients of the Bethel Institute, Bielefeld, Germany. They completed questionnaires on their overall QOL and life satisfaction, the PESOS scales on epilepsy-related QOL, the Brief Symptom Inventory (BSI), and scales on activities of daily life and work-related problems in face-to-face-interviews. QOL evaluations differed in the various domains and tended to be better on more concrete items. Correlations of generic QOL parameters with scales on epilepsy-related QOL were only weak. BSI scores reflecting the current emotional state were identified as the most influential predictors of all QOL measures. The weak relationship between non-health-related parameters of subjective QOL and epilepsy-related QOL requires further investigation and theoretical explanation, whereas the influence of negative affect on different QOL dimensions is in line with previous QOL findings.
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