OBJECTIVE: To examine the relation between sleep disturbance and neurocognitive ability among persons with traumatic brain injury (TBI). DESIGN: Correlational research evaluating demographic and neuropsychological predictors of sleep disturbance using multiple regression analysis and analysis of variance. PARTICIPANTS: Eighty-seven patients with mild to severe TBI admitted to a comprehensive outpatient neurorehabilitation program. MAIN OUTCOME MEASURES: Sleep disturbance assessed using the Pittsburgh Sleep Quality Index. RESULTS: Hierarchical regression analysis revealed that performance on selected measures of cognitive functioning significantly improved prediction of sleep disturbance, accounting for 14% of variance beyond that accounted for by injury severity and gender. The total model accounted for 31% of the variance in Pittsburgh Sleep Quality Index scores. Patients with mild TBI reported more sleep disturbance (P < .01) than did patients with severe TBI. CONCLUSIONS: Sleep disturbance among patients with TBI may be associated with a particular constellation of neuropsychological abilities. These issues are discussed in relation to prior findings that indicate the involvement of additional neuropsychiatric factors associated with sleep disturbance in mild TBI.
OBJECTIVE: To examine the relation between sleep disturbance and neurocognitive ability among persons with traumatic brain injury (TBI). DESIGN: Correlational research evaluating demographic and neuropsychological predictors of sleep disturbance using multiple regression analysis and analysis of variance. PARTICIPANTS: Eighty-seven patients with mild to severe TBI admitted to a comprehensive outpatient neurorehabilitation program. MAIN OUTCOME MEASURES: Sleep disturbance assessed using the Pittsburgh Sleep Quality Index. RESULTS: Hierarchical regression analysis revealed that performance on selected measures of cognitive functioning significantly improved prediction of sleep disturbance, accounting for 14% of variance beyond that accounted for by injury severity and gender. The total model accounted for 31% of the variance in Pittsburgh Sleep Quality Index scores. Patients with mild TBI reported more sleep disturbance (P < .01) than did patients with severe TBI. CONCLUSIONS:Sleep disturbance among patients with TBI may be associated with a particular constellation of neuropsychological abilities. These issues are discussed in relation to prior findings that indicate the involvement of additional neuropsychiatric factors associated with sleep disturbance in mild TBI.
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