title: Principal components analysis of the Neurobehavioral Symptom Inventory in a nonclinical civilian sample.
abstract: The study examined the component structure of the Neurobehavioral Symptom Inventory (NSI) under five different models. The evaluated models comprised the full NSI (NSI-22) and the NSI-20 (NSI minus two orphan items). A civilian nonclinical sample was used. The 575 volunteers were predominantly university students who screened negative for mild TBI. The study design was cross-sectional, with questionnaires administered online. The main measure was the Neurobehavioral Symptom Inventory. Subscale, total and embedded validity scores were derived (the Validity-10, the LOW6, and the NIM5). In both models, the principal components analysis yielded two intercorrelated components (psychological and somatic/sensory) with acceptable internal consistency (alphas > 0.80). In this civilian nonclinical sample, the NSI had two underlying components. These components represent psychological and somatic/sensory neurobehavioral symptoms.
authors.affiliation: a School of Psychology and Counselling , Queensland University of Technology , Brisbane , Australia.|b Institute of Health and Biomedical Innovation , Queensland University of Technology , Brisbane , Australia.
authors.forename: Karen A
authors.initials: KA
authors.lastname: Sullivan
authors.affiliation: a School of Psychology and Counselling , Queensland University of Technology , Brisbane , Australia.
authors.forename: Janine K
authors.initials: JK
authors.lastname: Lurie
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001924:Brain Concussion / Q000175:diagnosis*; D060825:Cognitive Dysfunction / Q000175:diagnosis*; D003430:Cross-Sectional Studies; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000592:standards*; D025341:Principal Component Analysis; D055815:Young Adult
keywords: Concussion; minor head injury; postconcussion; traumatic brain injury