The moderating role of caregiver preparedness on the relationship between depression and stroke-specific quality of life in stroke dyads: a longitudinal study

Aims To examine the moderating role of caregiver preparedness on the association between stroke survivors' depression and stroke-specific quality of life dimensions. Methods and results We used a multilevel modelling approach to analyse trajectories of change in the eight Stroke Impact Scale 3.0 subscales [i.e. strength, communication, mobility, activities of daily living (ADL)/instrumental activities of daily living (IADL), memory, emotion, hand function, participation] using Hierarchical Linear Modeling. Caregiver preparedness significantly moderated the association between survivor depressive symptoms and survivor communication (B = -0.95, P < 0.01), mobility (B = -0.60, P < 0.05), and ADL/IADL (B = -0.73, P < 0.01) at baseline; linear change for strength (B = 0.83, P < 0.05) and communication (B = 0.66, P < 0.05); and quadratic change for strength (B = -0.19, P < 0.01). Although caregiver preparedness did not significantly moderate the association between survivor depressive symptoms and strength at baseline, there was a significant moderating effect for change over time. Higher levels of caregiver preparedness were significantly associated with higher survivor scores of emotion, hand function, and participation at baseline. Conclusions Including immediate caregivers in the care process, through a psycho-educational training, would mean having better-prepared caregivers and consequently more-healthy stroke survivors. Given that preparedness includes coping with stress, responding and managing emergencies, assessing help and information may require tailored interventions aimed at improving the caregivers' skills and knowledge about stroke survivors' management.