Measurement of Sleep in Chronic Traumatic Brain Injury: Relationship Between Self-report and Actigraphy.

OBJECTIVE: To examine the relationship between self-report and actigraphy measurement of sleep in people with and without traumatic brain injury (TBI) by addressing 2 aims: (1) to assess the relationship between self-report and actigraphy for sleep quantity in people with and without TBI; and (2) to explore how self-report and actigraphy capture sleep quality in TBI. SETTING: Participants completed the study over 2 weeks in their own homes. They wore activity monitors, day and night, throughout the experiment and completed morning sleep diaries while interacting with an experimenter on videoconference. PARTICIPANTS: This project was embedded in a larger study on sleep and word learning in 100 adults: 50 with chronic, moderate-severe TBI and 50 demographically matched noninjured peers. Of the 100 participants who completed the larger study, 92 participants (45 with TBI and 47 noninjured peers) had sufficient actigraphy data for inclusion in the current study. DESIGN: We used multilevel linear regression models and correlation analyses to assess how well participants' self-report corresponded to actigraphy measurement of sleep. MAIN MEASURES: Actigraphy measures included nightly sleep duration and nighttime wakeups. Sleep diary measures included self-reported nightly sleep duration, nighttime wakeups, sleep quality, and morning fatigue. RESULTS: People with and without TBI did not differ in the relationship between self-reported and actigraphy measurement of sleep quantity. Performance on a neuropsychological memory assessment did not correlate with the difference in self-reported and actigraphy-measured sleep in the TBI group. Sleep characteristics that were measured by actigraphy did not predict subjective experiences of sleep quality or fatigue. CONCLUSIONS: Short-term self-report diaries capture accurate information about sleep quantity in individuals with TBI and may support self-report of other daily habits. Future research is needed to identify reliable metrics of sleep quality, and how they relate to other domains such as memory and mood, in the chronic phase of TBI.

The Value of Patient Registries to Advance Basic and Translational Research in the Area of Traumatic Brain Injury.

The number of individuals affected by traumatic brain injury (TBI) is growing globally. TBIs may cause a range of physical, cognitive, and psychiatric deficits that can negatively impact employment, academic attainment, community independence, and interpersonal relationships. Although there has been a significant decrease in the number of injury related deaths over the past several decades, there has been no corresponding reduction in injury related disability over the same time period. We propose that patient registries with large, representative samples and rich multidimensional and longitudinal data have tremendous value in advancing basic and translational research and in capturing, characterizing, and predicting individual differences in deficit profile and outcomes. Patient registries, together with recent theoretical and methodological advances in analytic approaches and neuroscience, provide powerful tools for brain injury research and for leveraging the heterogeneity that has traditionally been cited as a barrier inhibiting progress in treatment research and clinical practice. We report on our experiences, and challenges, in developing and maintaining our own patient registry. We conclude by pointing to some future opportunities for discovery that are afforded by a registry model.

Teaching Trauma-Informed Care: A Symposium for Medical Students.

Introduction: A large body of evidence links exposure to childhood trauma with negative health outcomes. Training future physicians to recognize and respond to trauma is paramount, and engaging medical students in the preclinical years affords the opportunity to foster the development of a trauma-informed lens that can then be solidified during clinical clerkships. Methods: We developed and implemented a 4-hour trauma-informed care (TIC) symposium for 179 second-year medical students at the George Washington University School of Medicine and Health Sciences during the Patients, Populations, and Systems course. The symposium included three interactive didactic sessions focusing on the connection between trauma and health and TIC principles. A facilitated small-group discussion allowed students to apply TIC principles to a patient case, followed by reflection and evaluation. Results: The overall rating of the TIC symposium was 4 out of 5. Strengths included integration of a small-group case with discussion on application of TIC in practice, experience of the lecturers and small-group facilitators, and review of research relating adversity to specific health outcomes. Suggestions for improvement included incorporating role-play and standardized patients. Content analysis of student reflections mapped to the domains of physician competency. Discussion: A 4-hour symposium can affect student knowledge and understanding of TIC. Teaching TIC presents an opportunity to prepare medical students for a career in medicine through cultivation of required physician competencies. Next steps include enhanced opportunities to practice TIC and follow-up analysis of participants to determine behavior change during clinical years.

Removal of Cryptosporidium and polystyrene microspheres from swimming pool water with sand, cartridge, and precoat filters.

Cryptosporidium has caused the majority of waterborne disease outbreaks in treated recreational water venues in the USA for many years running. This research project evaluated some common US swimming pool filters for removing Cryptosporidium oocysts, 5-µm diameter polystyrene microspheres, and 1-µm diameter polystyrene microspheres. A 946 L hot tub with interchangeable sand, cartridge, and precoat filters was used at room temperature for this research. Simulated pool water for each experiment was created from Charlotte, NC (USA) tap water supplemented with alkalinity, hardness, chlorine, and a mixture of artificial sweat and urine. Precoat (i.e., diatomaceous earth and perlite) filters demonstrated pathogen removal efficiencies of 2.3 to 4.4 log (or 99.4-99.996%). However, sand and cartridge filters had average Cryptosporidium removals of 0.19 log (36%) or less. The combined low filter removal efficiencies of sand and cartridge filters along with the chlorine-resistant properties of Cryptosporidium oocysts could indicate a regulatory gap warranting further attention and having significant implications on the protection of public health in recreational water facilities. The 5-µm microspheres were a good surrogate for Cryptosporidium oocysts in this study and hold promise for use in future research projects, field trials, and/or product testing on swimming pool filters.