Nonpharmacological interventions to improve the cognitive function among persons with traumatic brain injury: A systematic review

Abstract Purpose The systematic review aimed to evaluate the effectiveness of nonpharmacological interventions (NPIs) for improving cognitive function among persons with traumatic brain injury. Design A systematic review. Methods This systematic review was registered in PROSPERO and followed the PRISMA guideline. PubMed, ScienceDirect, Scopus, SpringerLink, Wiley Online Library, JSTOR, and Taylor & Francis were systematically searched for relevant articles of peer‐reviewed studies published between 2008 and 2022. Two independent researchers conducted study selection, data extraction, and data quality assessment. Findings Twenty‐one studies met inclusion criteria, numbering a total of 757 participants. Six groups of NPIs were effective in improving cognitive functioning among persons with traumatic brain injury, including multimodal cognitive training, technology innovation, memory training, executive function training, physical activity, and sensory stimulation programs. Pooled evidence revealed that NPIs had a large effect on memory ( d = 0.80, p < 0.05 to d = 2.03, p < 0.000), processing speed ( d = 1.58, p < 0.05), and cognitive behavior ( d = 1.63, p < 0.001 to d = 8.91, p 0.003). There was a medium effect on executive function ( d = 0.5, p < 0.01 to d = 0.62, p < 0.05), attention ( d = 0.5, p < 0.01), and intelligence ( d = 0.57 to d = 0.59, p = 0.000). For visuospatial function and language, there was a significant increase post‐intervention. Conclusion Evidence from this systematic review indicates that NPIs, specifically the use of multimodal cognitive training and sensory stimulation programs, were effective in improving cognitive function outcomes among persons with traumatic brain injury, with medium to large effect sizes. Clinical Relevance Nonpharmacological interventions (NPIs) can enhance cognitive function in individuals with traumatic brain injury. These findings can guide healthcare professionals in clinical settings and support the development of technology applications for cognitive rehabilitation using NPIs.