The course and prognostic factors of cognitive outcomes after traumatic brain injury: A systematic review and meta-analysis

Mollayeva, T. and Mollayeva, S. and Pacheco, N. and D’Souza, A. and Colantonio, A.

Neurosci Biobehav Rev (2019) 99: 198–250

DOI: 10.1016/j.neubiorev.2019.01.011

Abstract

Despite indications that TBI may be a precursor of cognitive decline and subsequent development of Alzheimer’s disease, little is known about the time course of this relationship and the factors involved. This systematic review summarizes the evidence pertinent to this subject matter. All English language studies of longitudinal design, and works cited within them, found in six literature databases, were considered, and their quality assessed. Of 65 articles appraised, 44 studies were selected. Results were organized by timing of assessments, injury severity, and cognitive domains assessed. Differences in the course of cognitive performance were observed across injury severity groups and cognitive domains, with differential proportions of reports of improvement, decline, or no change over time. The evidence for genetic, sex-, age-, and injury-related factors as determinants of cognitive outcome was inconsistent. The non-uniform trajectory of cognitive performance post-TBI supports the notion that this construct is non-homogeneous, and that different factors influence its course. Agreement on a core set of predictors and consideration of psychometric properties of outcome measures is needed.

Citation

Mollayeva, T., Mollayeva, S., Pacheco, N., D’Souza, A., & Colantonio, A. (2019). The course and prognostic factors of cognitive outcomes after traumatic brain injury: A systematic review and meta-analysis. Neurosci Biobehav Rev, 99, 198–250. https://doi.org/10.1016/j.neubiorev.2019.01.011 Animals, Humans, Prognosis, *Systematic review, Cognition/*drug effects, *Prognosis, *Alzheimer’s disease, *Cognition, *Females, *Level of evidence, *Males, *Traumatic brain injury, Alzheimer Disease/diagnosis/drug therapy, Brain Injuries, Traumatic/diagnosis/drug therapy/*psychology, Cognition Disorders/diagnosis/drug therapy/*psychology, Cognitive Dysfunction/diagnosis/drug therapy/*psychology

Keywords

• Animals
• Humans
• Prognosis
• *Systematic review
• Cognition/*drug effects
• *Prognosis
• *Alzheimer’s disease
• *Cognition
• *Females
• *Level of evidence
• *Males
• *Traumatic brain injury
• Alzheimer Disease/diagnosis/drug therapy
• Brain Injuries
• Traumatic/diagnosis/drug therapy/*psychology
• Cognition Disorders/diagnosis/drug therapy/*psychology
• Cognitive Dysfunction/diagnosis/drug therapy/*psychology