Impact of Cognitive Fatigue on Reported Post-concussive Complaints in a Sample of Veterans with Post-traumatic Stress Disorder
General Material Designation
[Thesis]
First Statement of Responsibility
Naylon, Kara
Subsequent Statement of Responsibility
Ji, Peter
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
Adler University
Date of Publication, Distribution, etc.
2019
GENERAL NOTES
Text of Note
44 p.
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
Psy.D.
Body granting the degree
Adler University
Text preceding or following the note
2019
SUMMARY OR ABSTRACT
Text of Note
Recent reports on military personnel returning from Iraq and Afghanistan raised concerns about persistent post-concussive symptoms in veterans although the etiology is not fully understood. Diagnostic criteria for Post-Concussional Disorder (PCD) include subjective post-concussive symptoms that persist longer than three months and objective evidence of cognitive impairment with an onset after the injury. The relationship between these subjective and objective symptoms and their associations with other post-concussive symptoms remains unclear. Hierarchical regression analysis showed that objective measures of cognitive fatigue were not significantly associated with subjective complaints of physiological post-concussive symptoms after controlling for estimated premorbid IQ and for other forms of cognitive impairment. A planned bivariate analysis showed a significant inverse association between cognitive fatigue and education. Exploratory bivariate analyses showed that subjective complaints of physiological post-concussive symptoms were associated with sex (higher in females) and with lower estimates of premorbid IQ. An exploratory hierarchical regression analysis showed that a significant portion of the variance in endorsement of physiological post-concussive complaints was accounted for by factors predating head injury and that factors believed to be related to head injury (acquired cognitive impairment, cognitive fatigue) did not account for any additional variance. The findings from this study highlight the importance of taking into account premorbid factors when examining persistent post-concussive complaints and PCD.