Abstract
Background Psychiatric symptoms are common in Huntington’s disease (HD) and contribute significantly to impairment of Functional Capacity. Low mood, anxiety and irritability are common in early HD, but affective symptoms are also common in the general population and previous studies have found that the mood disorder of HD correlates poorly with motor and cognitive measures of disease progression. Apathy tends to occur later, and correlates more closely with disease progression than the mood symptoms, probably because there is no effective symptomatic treatment. Measurement of psychiatric symptoms is also confounded by anosognosia and denial, limiting the usefulness of self-report measures. Methods One of the objectives of the Repair-HD study was to validate a new Core Assessment Protocol for Intra-cerebral Transplantation in HD (CAPIT-HD2), which includes several psychiatric measures. These include a semi-structured interview, the Problem Behaviours Assessment for HD (PBA-s), and several Patient-Reported Outcome (PRO) measures including the Frontal Systems Behaviour Scale (FrSBe), the Apathy Evaluation Scale (AES), the Hospital Anxiety and Depression Scale (HADS) and two PRO irritability scales. We examined correlations between the different measures of apathy, anxiety, depression, and irritability in the baseline psychiatric data. Results All four apathy measures were significantly correlated with each other (p Conclusions The interview and self-report measures used in this study were broadly consistent in this population of patients with stage 1 and stage 2 HD, with the possible exception of depression. A future analysis of changes between the baseline and 12-month assessments will examine the potential of each of these scales to measure disease progression in HD.
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