Association of physical and mental symptoms with cognition in people with spinal cord injury

To examine the association between physical and mental symptoms and cognition in people with spinal cord injury. Research Method/Design: One hundred seventy-four community-dwelling adults with spinal cord injury completed several self-reported measures of health-related quality of life (Patient-Reported Outcomes Measurement Information System [PROMIS] Cognitive Abilities, Anxiety, Depression, Fatigue, and Pain Intensity) as well as a traditional neuropsychological assessment (six tests that included assessments of processing speed, working memory, memory, executive function, and attention). A series of multivariable linear regressions were used to test for associations between physical and mental symptoms and the seven ratings of cognition (i.e., scores on PROMIS Cognitive Abilities, as well as the six scores from the neuropsychological tests) after controlling for age, gender, education, and injury classification.

There was generally no association between symptom measures and neuropsychological test performance with one exception: Greater pain was associated with poorer performance on attention. However, anxiety and fatigue were associated with lower self-perceived cognitive function. Among those individuals with evidence of cognitive impairment in at least one cognitive domain, anxiety was also associated with lower working memory score, and fatigue was associated with lower delayed memory performance.

While the associations between pain and cognitive performance are consistent with general literature, the absence of a relationship between other symptoms (i.e., depression and fatigue) and cognitive performance was somewhat more surprising. Similarly, the associations between anxiety and fatigue with perceived cognitive function are consistent with the general literature, yet the absence of a relationship with depression was somewhat more surprising. Future work is needed to replicate these findings. (PsycInfo Database Record (c) 2021 APA, all rights reserved).