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Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
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1 to 3 of 3 Research Studies DisplayedMorrow EL, Mayberry LS, Duff MC
The growing gap: a study of sleep, encoding, and consolidation of new words in chronic traumatic brain injury.
Evidence from neuroscience emphasizes sleep as a crucial support for longitudinal memory and word learning. In numerous lab-based word learning experiments, participants encode and then retrieve new words within the same session. Single session designs are not adequate for capturing the full word learning process. Single session studies also inhibit exploration of the role of behavioral and lifestyle factors such as sleep in supporting longitudinal word learning. Adults with a history of traumatic brain injury (TBI), who experience challenges in the memory systems that support word learning and report related sleep disturbance, provide a unique opportunity to explore linkages between memory, sleep, and word learning. The purpose of this study was to evaluate longitudinal word learning and the influence of sleep on short- and long-term word recall in 50 adults with chronic moderate-severe traumatic brain injury (TBI) and 50 demographically matched neurotypical peers. Participants took part in the study over a two week period in their homes in an attempt to capture the process of real-world word learning and to measure sleep within normal living conditions. The study found that participants with TBI demonstrated a deficit in word learning that started at encoding, continued across time, and increased over the course of the week. The gap in performance between groups was greater at the 1-week post-test than the immediate post-test. Participants with and without TBI recalled more words when they slept after learning.
AHRQ-funded; HS026122.
Citation: Morrow EL, Mayberry LS, Duff MC .
The growing gap: a study of sleep, encoding, and consolidation of new words in chronic traumatic brain injury.
Neuropsychologia 2023 Jun 6; 184:108518. doi: 10.1016/j.neuropsychologia.2023.108518..
Keywords: Brain Injury, Chronic Conditions, Sleep Problems, Trauma
Luther M, Poppert Cordts KM, Williams CN
Sleep disturbances after pediatric traumatic brain injury: a systematic review of prevalence, risk factors, and association with recovery.
This is a systematic review to quantify sleep wake disturbances (SWD) after pediatric traumatic brain injury (TBI). These SWD can place children at risk for worse outcomes since sleep is needed for brain development and healing after injury. They also evaluated interventions for SWD and the association between SWD and other post-traumatic outcomes. Literature was searched from 1999-2019 evaluating sleep or fatigue in children hospitalized for TBI. Two independent reviewers assessed quality of the studies using the Newcastle-Ottowa Score for observational studies. Out of 966 identified articles, 126 full text articles were reviewed and 24 studies were included. Studies showed at least 20% of children with TBI had some degree of SWD including trouble falling or staying asleep, fatigue, daytime fatigue, and nightmares. SWD was negatively correlated with cognitive, behavioral, and quality of life outcomes. There was moderate-high risk of bias for all studies due to small sample size and lack of validated or objective SWD measures.
AHRQ-funded; HS022981.
Citation: Luther M, Poppert Cordts KM, Williams CN .
Sleep disturbances after pediatric traumatic brain injury: a systematic review of prevalence, risk factors, and association with recovery.
Sleep 2020 Oct;43(10):zsaa083. doi: 10.1093/sleep/zsaa083..
Keywords: Children/Adolescents, Sleep Problems, Brain Injury, Neurological Disorders, Trauma, Risk, Patient-Centered Outcomes Research, Outcomes, Quality of Life, Evidence-Based Practice
Williams CN, Hartman ME, McEvoy CT
Sleep-wake disturbances after acquired brain injury in children surviving critical care.
Sleep-wake disturbances are underevaluated among children with acquired brain injury surviving critical care. In this prospective cohort study, the investigators aimed to quantify severity, phenotypes, and risk factors for sleep-wake disturbances. The investigators concluded that over half of children surviving critical care with acquired brain injury have sleep-wake disturbances. They indicated that many sleep-wake disturbances phenotypes were identified, but most children had disturbance in initiation and maintenance of sleep.
AHRQ-funded; HS022981.
Citation: Williams CN, Hartman ME, McEvoy CT .
Sleep-wake disturbances after acquired brain injury in children surviving critical care.
Pediatr Neurol 2020 Feb;103:43-51. doi: 10.1016/j.pediatrneurol.2019.08.010..
Keywords: Children/Adolescents, Brain Injury, Critical Care, Sleep Problems, Trauma, Injuries and Wounds, Neurological Disorders