Publications by authors named "Gina Mathew"

Article Synopsis
  • A group of experts met online to decide if using screens, especially before bed, is bad for sleep in kids, teens, and adults.
  • They looked at lots of studies and found that screens do hurt sleep, particularly for children and teenagers.
  • They agreed that certain behaviors and strategies can help lessen the negative effects of screen time on sleep.
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  • The study investigates how different sleep dimensions, measured using actigraphs, impact the academic performance of adolescents, revealing mixed findings about sleep duration.
  • Research involving nearly 800 diverse teens found that later sleep times and greater variability in sleep patterns are linked to poorer academic outcomes, including lower GPAs and increased likelihood of disciplinary actions at school.
  • The results suggest that maintaining consistent and adequate sleep schedules could enhance academic success for adolescents.
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This study aimed to examine the association between sleep measures (self-reported sleep duration and weekend catch-up sleep) and grade point average (GPA) and absences among 9 grade students from two racially and economically diverse high schools in a semi-rural county of north-central Georgia. Linear and Poisson regression models estimated the association between sleep measures and GPA and absences (separately), respectively. Analyses adjusted for gender, race/ethnicity, free/reduced-price school lunch status, and parental education.

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Purpose: To determine the micro-longitudinal effects of duration and timing of screen-based activities on sleep within and between adolescents.

Methods: Daily survey and actigraphy data from the age 15 wave of the Future of Families and Child Wellbeing Study were analyzed using multilevel modeling. Four hundred seventy five adolescents provided three or more days of valid daily survey and nighttime sleep data.

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Objectives: Short sleep duration is associated with poor physical health in college students. Few studies examine the effects of sleep extension on physical health in this population, who are susceptible to sleep loss. We examined health effects of a 1-week, 1-hour nightly sleep extension in college students.

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Purpose: Poor sleep health is associated with lower positive mood in adolescents, and more variable sleep is associated with more negative mood. There is a lack of research on the associations between sleep variability and positive mood in adolescents. We investigated whether several types of sleep variability, measured with actigraphy, were associated with positive mood reported on a daily diary in adolescents.

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Article Synopsis
  • Sleep restriction was found to lower daytime heart rate (HR) during the initial phase but led to increased HR and systolic blood pressure (SBP) during recovery sleep.
  • The study involved 15 healthy young men undergoing an 11-day protocol consisting of baseline, restricted, and recovery sleep phases while measuring their HR and BP every two hours.
  • Results indicated that HR and SBP did not return to baseline levels after recovery sleep, implying that extended recovery may be needed to fully compensate for the effects of sleep loss.
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Purpose: The goal of this study was to evaluate the relationships of actigraphic nighttime sleep duration and quality with next-day mood among urban adolescents using a micro-longitudinal design.

Methods: A subsample (N = 525) of participants from the Fragile Families & Child Wellbeing Study (mean age: 15.4 years; 53% female; 42% Black non-Hispanic, 24% Hispanic/Latino, 19% White non-Hispanic) in the United States between 2014 and 2016 concurrently wore a wrist actigraphic sleep monitor and rated their daily mood in electronic diaries for about 1 week.

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Article Synopsis
  • Sleep loss negatively impacts both physical and mental health, with specific concerns about how reduced sleep affects working memory and force control.
  • A study involving 14 men examined the effects of sleep restriction on their ability to produce force, using both visually guided and memory-guided tasks over an eleven-day period.
  • Results indicated that sleep restriction impaired visually guided force production, while memory-guided tasks remained relatively unaffected; additionally, feelings of alertness influenced performance in memory-guided tasks.
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Background: Poor self-reported sleep health has been linked to not consuming breakfast in adolescents, but it is unknown whether poor sleep measured objectively predicts next-day breakfast consumption within adolescents. We investigated within- and between-person associations of objectively measured sleep dimensions and subjective sleep quality with adolescent breakfast consumption.

Methods: Data were collected from a micro-longitudinal substudy of the Year 15 wave of the Fragile Families and Child Wellbeing Study (n = 590).

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  • * A study involving 589 adolescents used actigraphy devices to objectively measure sleep patterns and daily surveys to assess caffeine consumption over a week, revealing that variability in sleep duration and timing correlated with higher caffeine intake.
  • * The findings indicate that after consuming caffeine, adolescents tend to have later bedtimes and wake times, suggesting that reducing caffeine might help improve their sleep schedules and overall sleep quality.
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We investigated whether interindividual attentional vulnerability moderates performance on domain-specific cognitive tasks during sleep restriction (SR) and subsequent recovery sleep. Fifteen healthy men (M ± SD, 22.3 ± 2.

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Purpose: The effects of sleep restriction on subjective alertness, motivation, and effort vary among individuals and may explain interindividual differences in attention during sleep restriction. We investigated whether individuals with a greater decrease in subjective alertness or motivation, or a greater increase in subjective effort (versus other participants), demonstrated poorer attention when sleep restricted.

Participants And Methods: Fifteen healthy men (M±, 22.

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Purpose: In non-rapid eye movement (NREM) stage 3 sleep (N3), phase-locked pink noise auditory stimulation can amplify slow oscillatory activity (0.5-1 Hz). Open-loop pink noise auditory stimulation can amplify slow oscillatory and delta frequency activity (0.

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  • A study found that social jetlag (discrepancy between biological and social clock) is linked to eating habits and body mass index (BMI) in adolescents, highlighting a research gap in this area.
  • Analysis of responses from 3060 adolescents showed that greater social jetlag was related to lower breakfast and fruit/vegetable consumption, while increasing fast food and sweetened drink intake.
  • While social jetlag was associated with higher BMI, this connection weakened when accounting for race/ethnicity, suggesting these factors may influence the relationship and should be explored in future research.
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  • Multisensor wearable devices, like the Apple Watch and Oura Ring, are increasingly used for analyzing sleep at home, but their accuracy compared to traditional methods like polysomnography (PSG) hasn’t been fully established.
  • In a study with eight participants, various wearable devices were tested against PSG over four nights to assess their sleep-wake classification accuracy.
  • Results showed that the wearable devices had a strong correlation with PSG data and can be effectively used to create models for sleep-wake analysis that compete with existing research tools.
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Although short total sleep time (TST) is associated with increased anxious symptoms in adolescents, it is unknown whether social jetlag, a misalignment between sleep timing on the weekend and school week, is independently associated with anxious symptoms. In the current study, sleep timing, anxious symptoms, and demographic information were assessed from 3097 adolescents (48% female, mean ± SD age 15.59 ± .

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Social jetlag, a misalignment between sleep timing on the weekend and during the work week, is associated with depressive symptoms among adults across both sexes. A previous study found that later sleep timing was associated with depressive symptoms in women but not men. To date, however, no research has investigated whether the association between social jetlag and depression varies by sex among adolescents.

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  • This study examined how sleep deprivation affects college students' perception of task difficulty and their use of mental shortcuts (heuristics) when compared to students who had a good night's sleep at home.
  • Students were divided into two groups: those who experienced normal sleep (NES) and those who were totally sleep-deprived (TSD) before completing tasks the next day.
  • Results showed that TSD students found tasks harder, relied more on shortcuts like skipping instructions, and rated unattractive items unfairly, indicating that lack of sleep negatively impacts their decision-making abilities.
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Background And Objectives: Diagnostic codes are used widely within health care for billing, quality assessment, and to measure clinical outcomes. The US health care system will transition to the International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM), in October 2015. Little is known about how this transition will affect pediatric practices.

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Substance P (neurokinin-1 [NK1]) receptor antagonists appear to be effective antidepressant and anxiolytic agents, as indicated in 3 double-blind clinical trials. In laboratory animals, they promptly attenuate the responsiveness of serotonin (5-hydroxytryptamine [5-HT]) and norepinephrine (NE) neurons to agonists of their cell-body autoreceptors, as is the case for some antidepressant drugs that are currently in clinical use. Long-term, but not subacute, antagonism of NK1 receptors in rats increases 5-HT transmission in the hippocampus, a property common to all antidepressant treatments tested thus far.

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