Objective: The reduction of goal-directed behavior, termed apathy, is a pervasive and debilitating syndrome after traumatic brain injury (TBI). However, understanding of apathy as a multifaceted construct is limited, especially in Southeast Asian nations. This study aimed to investigate the severity, insight, and psychosocial influences of apathy in executive, emotional, and initiation dimensions in Vietnam-a country with high prevalence of TBI. Method: One hundred and eleven Vietnamese participants (61 individuals with moderate to severe TBI and 50 healthy controls) and their informants completed the self-rated and informant-rated Dimensional Apathy Scale (DAS) for the assessment of executive, emotional, and initiation apathy severity. Insight of apathy was calculated by subtracting DAS self-ratings from informant ratings. Additionally, carers completed measures assessing psychosocial factors of overall family health and overprotective behavior, while participants rated their own self-efficacy. Results: Our results showed greater informant-rated apathy for all three dimensions in individuals with TBI relative to controls. However, while people with TBI had greater selfrated initiation apathy, they regarded their executive apathy as lower and their emotional apathy as similar compared with controls. Reduced insight in patients was seen for executive and initiation apathy. Across participants, executive apathy was predicted by family functioning and overprotectiveness, emotional apathy was predicted by family functioning, and initiation apathy was predicted by self-efficacy. Conclusions: These findings support the multidimensional characterizations and socio-cultural considerations of apathy after TBI, which will potentially develop both individual-specific and symptom-specific approaches in clinical practice.
Key PointsQuestion: What are the clinical profiles of apathy after TBI in Vietnam? Findings: While apathy manifests in executive, emotional, and initiation dimensions after TBI, patients have reduced insight into some of these symptoms. The severity of apathy is predicted by family functioning and carers' overprotectiveness and patients' self-efficacy in Vietnam. Importance: Apathy is a multifaceted construct after TBI. Evaluations and treatment of apathy in Vietnam should be based on carer reports, specific psychosocial influences, and cultural contexts. Next Steps: Future cross-cultural studies are needed to facilitate better comparisons of apathy presentation and enhance precision of clinical practice.