@article{ref1,
title="Psychometric characteristics of the Insomnia Severity Index in veterans with history of traumatic brain injury",
journal="Behavioral sleep medicine",
year="2019",
author="Kaufmann, Christopher N. and Orff, Henry J. and Moore, Raeanne C. and Delano-Wood, Lisa and Depp, Colin A. and Schiehser, Dawn M.",
volume="17",
number="1",
pages="12-18",
abstract="OBJECTIVE/BACKGROUND: The Insomnia Severity Index (ISI) is a widely used self-report measure of insomnia symptoms. However, to date this measure has not been validated or well-characterized in veterans who have experienced traumatic brain injury (TBI). This study assessed the psychometric properties and convergent, divergent, construct, and discriminate validity of the ISI in veterans with a history of TBI. PARTICIPANTS: Eighty-three veterans with history of TBI were seen in the VA San Diego Healthcare System as part of a research protocol. <br><br>METHODS: Measures included the ISI, Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale, Neurobehavioral Symptom Inventory, Beck Depression Inventory-II, Beck Anxiety Inventory, and PTSD Checklist-Military Version. <br><br>RESULTS: The ISI demonstrated moderate to strong or excellent convergent and divergent validity. A principal component analysis indicated a single construct with excellent internal consistency (Cronbach's alpha = 0.92). In exploratory analyses, the ISI discriminated well between those with (73%) and without (27%) sleep disturbance based on the PSQI. <br><br>CONCLUSIONS: Results from this study indicate validity of the ISI in assessing insomnia in veterans with history of TBI and suggest a cutoff score not dissimilar from non-TBI populations. <br><br>FINDINGS from this study can help inform clinical applicability of the ISI, as well as future studies of insomnia in TBI.<p /> <p>Language: en</p>",
language="en",
issn="1540-2002",
doi="10.1080/15402002.2016.1266490",
url="http://dx.doi.org/10.1080/15402002.2016.1266490"
}