Psychological distress in partners of patients with amyotrophic lateral sclerosis and progressive muscular atrophy: what's the role of care demands and perceived control?

Caregivers of Amyotrophic Lateral Sclerosis (ALS) and Progressive Muscular Atrophy (PMA) patients often experience psychological distress. Yet, it is unclear which factors explain the variance in psychological distress. This study seeks to evaluate how care demands and perceived control over caregiving influence psychological distress using moderation and mediation analysis. Data were collected as part of a RCT and 148 partners of patients with ALS or PMA were included. Psychological distress was assessed using the Hospital Anxiety and Depression Scale. Care demands were operationalized as physical functioning (Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised) and behavioural changes of the patient (Amyotrophic Lateral Sclerosis-Frontotemporal Dementia-Questionnaire). Perceived control over caregiving was assessed using items adapted from the Job Content Questionnaire. Results showed that more behavioural changes and lower perceived control over caregiving were associated with higher levels of psychological distress in caregivers. Patients' physical functioning was not significantly related to caregivers' psychological distress. No moderation or mediation effects were found of perceived control over caregiving on the relationship between demand and psychological distress. Monitoring, psychoeducation and caregiver support with regard to behavioural changes in patients, seem to be important for the wellbeing of caregivers. Caregivers' perceived control might be a target for future interventions.

Microstructural White Matter Abnormalities and Cognitive Impairment After Aneurysmal Subarachnoid Hemorrhage.

Background and Purpose- Aneurysmal subarachnoid hemorrhage (aSAH) may have detrimental effects on white matter microstructure, which may in turn explain the cognitive impairments that occur often after aSAH. We investigated (1) whether the white matter microstructure is altered in patients with aSAH compared with patients with an unruptured intracranial aneurysm and (2) whether these abnormalities are associated with cognitive impairment 3 months after ictus. Methods- Forty-nine patients with aSAH and 22 patients with an unruptured intracranial aneurysm underwent 3T brain magnetic resonance imaging, including a high-resolution diffusion tensor imaging sequence. Patients with aSAH were scanned 2 weeks and 6 months after ictus. Microstructural white matter alterations were quantified by the fractional anisotropy and mean diffusivity (MD). Cognition was evaluated 3 months after ictus. Results- Patients with aSAH had higher white matter MD 2 weeks after ictus than patients with an unruptured intracranial aneurysm (mean difference±SEM, 0.3±0.01×10-3 mm2/s; P≤0.01), reflecting an abnormal microstructure. After 6 months, the MD had returned to the level of the unruptured intracranial aneurysm group. No between-group differences in fractional anisotropy were found (-0.01±0.01; P=0.16). Higher MD at 2 weeks was associated with cognitive impairment after 3 months (odds ratio per SD increase in MD, 2.6; 95% CI, 1.1-6.7). The association between MD and cognitive impairment was independent of conventional imaging markers of aSAH-related brain injury (ie, cerebral infarction, hydrocephalus, total amount of subarachnoid blood, total brain volume, or white matter hyperintensity severity). Conclusions- Patients with aSAH have temporary white matter abnormalities in the subacute phase that are associated with cognitive impairment at 3 months after ictus.