Publications by authors named "Dayna Johnson"

The prevalence of obstructive sleep apnea (OSA) is on the rise, driven by various factors including more sensitive diagnostic criteria, increased awareness, enhanced technology through at-home testing enabling easy and cost-effective diagnosis, and a growing incidence of comorbid conditions such as obesity. Treating symptomatic patients with OSA syndrome to enhance quality of life remains a cornerstone approach. However, there is a lack of consensus regarding treatment to improve cardiovascular disease (CVD) outcomes, particularly in light of overall negative results from several randomized controlled trials (RCT) indicating no benefit of positive airway pressure (PAP) therapy on primary and secondary CVD events.

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Study Objectives: Recent data has indicated that Black Americans experience more severe insomnia compared to their White counterparts. Although previous studies have identified psychosocial mechanisms driving this disparity, little is known about the structural determinants of insomnia disparities. This study tested neighborhood social vulnerability as a mechanism driving Black-White disparities in insomnia severity in the United States.

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Obstructive sleep apnea (OSA), a sleep-disordered breathing (SDB) disorder, affects at least 25 million adults in the United States and is associated with increased risk for hypertension, diabetes, and cardiovascular disease (CVD). Racial/ethnic minorities have a disproportionate burden of OSA along with the health sequelae associated with this condition. Despite supporting evidence of racial/ethnic disparities, few studies have investigated SDB including OSA among minoritized racial/ethnic groups.

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Objectives: To characterize representation and inclusion among Sleep Research Society members and examine associations between sociodemographic features and Sleep Research Society experiences.

Methods: The Sleep Research Society Taskforce for Diversity and Inclusion developed a web-based questionnaire in 2021, assessing membership data and Sleep Research Society experiences (self-initiated and society-initiated participation, feeling very welcomed, perceptions of inclusiveness, and diversity of viewpoints represented). Frequencies were calculated and adjusted Poisson regression models with robust variance were fit to estimate associations.

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Background: Discrimination may contribute to sleep health disparities among women, yet limited research has investigated the association between discrimination and insomnia with short sleep.

Methods And Results: Among a racially and ethnically diverse sample of women (N=25 920; mean age, 72.2±6.

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Article Synopsis
  • Adults who are Black and Hispanic tend to experience poorer sleep quality compared to White adults, and neighborhood conditions might influence this relationship, especially in marginalized communities.
  • A study involving 736 adults assessed sleep quality and memory, finding that worse neighborhood conditions correlate with poorer sleep quality and can affect memory performance differently based on race and gender.
  • For Black and Hispanic women, better neighborhood conditions helped link higher sleep quality to better memory performance, indicating the importance of community environment in cognitive health.
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Study Objectives: Hypertension is highly prevalent and is a major risk factor for cardiovascular disease. There is a higher burden of hypertension among individuals of lower socioeconomic status (SES), yet the role of sleep in understanding socioeconomic disparities in hypertension is unclear. We investigated whether sleep quality is a partial mediator of the association between SES and hypertension.

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  • Obstructive sleep apnea (OSA) is prevalent among older adults, particularly those over 65, and its relationship with posttraumatic stress disorder (PTSD) requires further research for personalized treatment approaches.
  • The study utilized a cross-sectional design involving male Vietnam War veteran twins to examine the link between PTSD symptoms and OSA, employing in-laboratory polysomnography for evaluation.
  • Results indicated that a 15-point increase in PTSD symptom severity was correlated with a higher apnea-hypopnea index, suggesting that PTSD may significantly impact OSA severity.
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  • Neighborhood deprivation is linked to increased breast cancer mortality among White women, with mixed findings for Black women, suggesting a need to explore how various neighborhood factors impact this relationship.
  • The study aims to determine the association between neighborhood deprivation and breast cancer mortality in both Black and White women while considering factors like rurality, residential mobility, and racial composition.
  • Using data from the Georgia Cancer Registry, the study analyzes the health outcomes of nearly 37,000 women diagnosed with early-stage breast cancer from 2010 to 2017, utilizing advanced statistical methods to uncover significant patterns.
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Objective: To compare dimensions of financial hardship and self-reported sleep quality among Black women with versus without systemic lupus erythematosus (SLE).

Methods: Participants were 402 Black women (50% with validated diagnosis of SLE) living in Georgia between 2017 and 2020. Black women with SLE were recruited from a population-based cohort established in Atlanta, and Black women without SLE were recruited to be of comparable age and from the same geographic areas as SLE women.

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Despite the importance of sleep to overall health and well-being, there is a high prevalence of undiagnosed sleep disorders and adverse sleep health, particularly among vulnerable populations. Such vulnerable populations include people experiencing homelessness (PEH), refugees, and incarcerated individuals. In this narrative review, we provide an overview of the literature on sleep health and disorders among key and vulnerable populations (e.

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Article Synopsis
  • This study investigates the link between heart rate variability (HRV) and deceleration capacity (DC) as indicators of autonomic function and their impact on mortality, specifically in a community sample of Vietnam Era twins.* -
  • After following 501 twin participants for an average of 12 years, findings indicate that higher low-frequency HRV and DC are significantly associated with lower risks of all-cause death, with day-time measures showing stronger correlations.* -
  • The results suggest that autonomic inflexibility, particularly due to vagal withdrawal, plays a key role in mortality risk, independent of genetic influences, emphasizing the importance of these metrics in health assessments.*
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  • The study examines the link between perceived neighborhood safety during childhood and sleep quality over a woman's life, focusing on 1,693 Black/African American women aged 23-35.
  • Participants recalled their neighborhood safety at ages 5, 10, and 15, and various sleep-related behaviors were assessed at age 5 and in adulthood.
  • Results showed that those who perceived their childhood neighborhoods as unsafe had higher chances of experiencing poor sleep behaviors and increased risk of short sleep and insomnia in adulthood, highlighting an area for potential early intervention.
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Unlabelled: Restless legs syndrome (RLS) and periodic limb movements of sleep (PLMS) have been variably implicated in risk for cardiovascular disease (CVD), but there is lack of consensus on these relationships. We sought to assess subclinical CVD measures and RLS/PLMS in a large cohort to further evaluate these associations. The Emory Center for Health Discovery and Well Being cohort is composed of employed adults, with subclinical CVD measures including endothelial function (flow-mediated vasodilation), microvascular function (reactive hyperemia index, RHI), arterial stiffness (pulse wave velocity and augmentation index), and carotid intima-media thickness (cIMT).

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Sleep health is an essential component to overall health. Because of numerous societal, economic, and biological factors, obtaining adequate sleep poses a unique challenge to aging women. Yet, women have been traditionally understudied in sleep research.

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Background And Objectives: Racial/ethnic differences have been documented in the relationship between obstructive sleep apnea (OSA) and stroke incidence, yet racial differences in OSA symptoms or treatment and their relationship with stroke incidence are underexplored and may contribute to stroke disparities. We comprehensively examined OSA symptoms and their relationships to stroke incidence by race/ethnicity.

Methods: Data were collected from the REasons for Geographic and Racial Differences in Stroke (REGARDS) study, a population-based cohort of Black and White individuals in the United States.

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Objectives: Similar to women overall, Black women are socialized to be communal and "self-sacrificing," but unlike women from other racial/ethnic backgrounds, Black women are also socialized to be "strong" and "invulnerable." This phenomenon is labeled Superwoman schema. This study examined associations between Superwoman schema endorsement and subjective sleep quality.

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Gendered racial microaggressions reflect historical and contemporary gendered racism that Black women encounter. Although gendered racial microaggressions are related to psychological outcomes, it is unclear if such experiences are related to sleep health. Moreover, the health effects of gendered racial microaggressions dimensions are rarely investigated.

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U.S. racial and ethnic minoritized groups face disproportionate cancer burdens compared to White Americans.

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Objective: Racial disparities in adolescent sleep duration have been documented, but pathways driving these disparities are not well understood. This study examined whether neighborhood and household environments explained racial disparities in adolescent sleep duration.

Methods: Participants came from Waves I and II of Add Health (n=13,019).

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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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Objective: Historically minoritized individuals experience greater exposure to light at night, yet it is unclear whether the association between light at night and sleep duration vary by race/ethnicity or sex. We examined the association between light at night and sleep duration by race/ethnicity and sex.

Methods: Participants (N = 6089, mean age=49.

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