Epidemiology Commons^™

Directional Association Between Irritable Bowel Syndrome And Dermatological Disease: A Large-Scale Retrospective Study, Alex Y. Liu, Naomi T. Matsuno, Houston Nelson, David Johnson, David Pariser

Department of Medicine Faculty Publications

Background/Objectives: Microbial dysbiosis is implicated with a pathogenic role in both irritable bowel syndrome (IBS) and several dermatological conditions. Yet, few studies have assessed a potential overlapping epidemiologic association. We aimed to assess the 1-year prevalence of common dermatologic conditions following an initial IBS diagnosis and to evaluate the reverse association using reciprocal analyses. Methods: We conducted a retrospective study using TriNetX. Patients aged 18–50 with no history of inflammatory bowel disease, celiac disease, or infectious intestinal disease were matched 1:1 to healthy controls by demographics and comorbidities. The primary outcome was the prevalence of acne vulgaris, psoriasis, …

Comparison Of Mental Illness Comorbidity Pre-Pandemic Vs. Pandemic-Era And Associations With Clinical And Demographic Characteristics For Virginia Public Hospital Inpatient Discharges With A Substance Use Disorder, Marilyn Bartholmae, Tharidu Gunawardena

Department of Medicine Faculty Publications

The rise in mental illnesses after the COVID-19 pandemic is well documented. However, it is not known whether the rates of mental illness comorbidity increased. The objectives of this study were to compare mental illness comorbidity rates before and after the pandemic among inpatients with SUD and to test associations between mental illness comorbidity, physical illness, and demographics. We used a retrospective cross-sectional design in a sample of inpatient discharges (N = 233,017) at Virginia public hospitals from January 2018 to December 2022. We used Z tests to compare rates of mental illness comorbidity pre- and post-pandemic and Chi-square tests …

Trends In Hypertension Prevalance And Control In The United States Over 25 Years, Omar Saleh, Neda Rehan, Saleh Mostafa, Rehan Qayyum

Department of Medicine Faculty Publications

Despite sustained public health efforts, hypertension remains highly prevalent in the United States, with persistent disparities across demographic and socioeconomic groups. We examined 25-year trends in hypertension prevalence, undiagnosed hypertension, and on-treatment uncontrolled hypertension in the United States using nationally representative National Health and Nutrition Examination Survey (NHANES) data from adults aged ≥18 years. Hypertension was defined as systolic BP ≥130 mmHg, diastolic BP ≥80 mmHg, or current antihypertensive use. Undiagnosed hypertension was defined as elevated BP without prior diagnosis or treatment, while on-treatment uncontrolled hypertension was defined as diagnosed hypertension with BP ≥130/80 mmHg despite treatment. Survey-weighted generalized linear …

Selenium And Liver Steatosis And Fibrosis: Opposing Direct And Steatosis-Mediated Associations In A Large Cohort, Neda Rehan, Jubilee Benedict, Rehan Qayyum

Department of Medicine Faculty Publications

Background and Aims

Epidemiologic studies have reported conflicting associations between selenium exposure and liver disease. Whether selenium exerts opposing direct and steatosis-mediated effects on liver fibrosis is unknown. To evaluate the associations of blood selenium with elastography-defined hepatic steatosis and fibrosis and to determine whether hepatic steatosis mediates the relationship between selenium and fibrosis.

Methods

We conducted a cross-sectional analysis of adults aged >= 18 years in NHANES 2017-2023. Hepatic steatosis was assessed using the controlled attenuation parameter (CAP) and fibrosis using liver stiffness measurement (LSM). Blood selenium was categorized into quartiles. Survey-weighted multivariable linear regression and structural equation modeling …

Seasonal And Geographic Patterns Of Gastroschisis In Canada: Protective Effect Of Periconceptional Sunlight Exposure, Shiliang Liu, Shin Jie Yong, Dunjin Chen, Gavin C. Hughes, Claude L. Hughes

Department of Medicine Faculty Publications

Background: Gastroschisis is a right-sided, full-thickness defect with extra-amnionic herniation of abdominal contents directly into the amniotic cavity. The causes of gastroschisis remain obscure. We hypothesized that limited periconceptional sunlight exposure might lead to insufficient vitamin D during fetal development and play a role in gastroschisis etiology.

Methods: We conducted a population-based cohort study of infants conceived in Canada between April 2006 and March 2020. We used winter months (i.e., November and December) and northern geographic latitudes as indicators of insufficient sunlight exposure, while summer months (July and August) and southern geographic latitudes were considered as reference. We examined the …

Glucagon-Like Peptide Receptor Agonists (Glp-1ras) As Cardiovascular Risk Modifiers In Obstructive Sleep Apnea And Obesity: A Real-World Study, Jaeun Ahn, Junmin Song, Kyle Admire, Yu Chang, Kuan-Yu Chi, Nathaniel T. Gordon, Joshua M. Sill

Department of Medicine Faculty Publications

Introduction

Obstructive sleep apnea (OSA) is a well-established risk factor for cardiovascular disease. Glucagon-like peptide-1 receptor agonists (GLP-1RAs) have demonstrated potential in reducing cardiovascular risk and improving OSA severity. However, a significant knowledge gap remains regarding the impact of GLP-1RAs on cardiovascular events in OSA patients.

Methods

We examined patients with a BMI over 30 diagnosed with OSA between January 2010 and November 2021 without a previous diagnosis of heart failure, pulmonary hypertension, or myocardial infarction. Two cohorts were created: those prescribed GLP-1RAs within 1 year of their OSA diagnosis and patients who were never prescribed GLP-1RAs. Propensity score matching …

Association Of Valvular Disease Progression Using Echocardiographic Findings In A Large U.S. Cohort, Abes A. Bautista Neughebauer, Amin Yehya, Raymond L. Benza, Deepak Talreja

Department of Medicine Faculty Publications

Background

The prevalence of valvular disease in the US is approximately 2.5%. Given that over 5 million Americans are affected, it is crucial to find those at higher risk of progression. The goal of this paper is to uncover which patients are more likely to have valvular disease progression using demographic factors, EKG and echocardiogram (ECHO) findings.

Methods

This paper utilized the EchoNext Database, which pairs 100,000 electrocardiograms and echocardiograms based on specific structural heart disease labels. Univariate and multivariate logistic regression were used to find risk factors for progression for aortic stenosis (AS), aortic regurgitation (AR), mitral regurgitation (MR), …

Spectral Frequency And Broadband Noise Analysis Of The Firefighter Environment: Potential Implications For Cardiac Health, James Blando, Catherine Reed, Amya Turner

Epidemiology, Biostatistics, & Environmental Health Faculty Publications

Firefighters are well known to have elevated risk of adverse health outcomes across a wide range of diseases and injuries, including cancer, hearing loss, fatal cardiac events, post-traumatic stress disorder (PTSD), sleep disorders, and many other adverse outcomes. It has been speculated that the noise environment is a significant risk factor for several of these diseases. In particular, the impact of noise on cardiac outcomes has recently been identified. An environmental survey of noise that included spectral and broadband analysis was conducted across all 14 firehouses in a southeastern city in the United States as a first step to investigate …

Examining The Association Of Maternal Oral Health Experiences With Adverse Birth Outcomes: Findings From Virginia's Prams Survey, May Salama, Abdullah Al-Taiar, Denise C. Mckinney, Li-Wu Chen, Anwar T. Merchant

Epidemiology, Biostatistics, & Environmental Health Faculty Publications

Background

Preterm birth (PTB) and low birth weight (LBW) are significant public health challenges globally, contributing to neonatal morbidity, mortality, and long-term complications. Maternal oral health has been increasingly recognized as a potential contributor to PTB and LBW, yet there is inconclusive evidence about the effectiveness of dental cleaning in preventing PTB and LBW. This study examined the association between dental cleaning during pregnancy and the prevalence of PTB and LBW using data from the Virginia Pregnancy Risk Assessment Monitoring System (PRAMS).

Methods

We analyzed data from Virginia PRAMS Phases 7 and 8, spanning a 10-year period from 2012 to …

Machine Learning Derived Abdominal Aortic Calcification Is Associated With Physical Frailty In Community-Dwelling Adults: The Uk Biobank Imaging Study, Abadi K. Gebre, Marion Mundt, Elsa Dent, James Webster, Afsah Saleem, Syed Zulqarnain Gilani, Yuandan Zhang, Cassandra Smith, Parminder Raina, John P. Kemp, William D. Leslie, John T. Schousboe, Nicholas C. Harvey, Joshua R. Lewis, Marc Sim

Research outputs 2022 to 2026

Clinical cardiovascular disease (CVD) is often present in frail individuals. However, it remains unclear whether subclinical CVD, e.g., abdominal aortic calcification (AAC), is associated with frailty. This study investigated the cross-sectional relationship between AAC scored using a validated machine learning model (ML-AAC24) and physical frailty. 49,081 participants from the UK Biobank Imaging Study without atherosclerotic CVD (ASCVD) diagnosis were included. ML-AAC24 extent was categorised as low, moderate and high, based on established severity categories. Physical frailty was based on a modified Fried’s frailty phenotype comprising weak hand grip strength, slow walking speed, weight loss, exhaustion, and physical inactivity. Individuals with …

Exploring The Impact Of Adverse Childhood Experiences On Preventive Healthcare Utilization In Rural Georgia, Ryan R. Traylor

College of Graduate Studies: Theses & Dissertations

This study examines the relationship between Adverse Childhood Experiences (ACEs) and preventive healthcare use among adults in Georgia, specifically within rural populations facing structural barriers. Using 2023 Georgia Behavioral Risk Factor Surveillance System (BRFSS) data, the research analyzes associations between ACE exposure, rural residence, and preventive care outcomes, including physical exams and flu vaccinations. Guided by an intersectionally adapted version of Andersen’s Behavioral Model of Health Services Use, the study evaluates how predisposing factors, enabling resources, and perceived barriers relate to healthcare engagement. Logistic regression analyses assess the correlation of ACE exposure, cost barriers, provider access, and sociodemographics with preventive …

Assessing And Advancing Pandemic Emergency Preparedness In New York City's Hospitals: A Strategic Management Toolkit Integrating Policy Analysis, Risk Assessment, And Stakeholder Insight, Irrem Jamal

College of Graduate Studies: Theses & Dissertations

This dissertation examines pandemic emergency preparedness in New York City hospitals, which were severely strained during COVID-19, revealing critical gaps between documented plans and operational readiness. Using a multimethod approach combining a survey of 20 stakeholders across city hospitals, semi-structured interviews, and document analysis of policy frameworks and after-action reports, the study identifies a persistent "documentation-execution paradox": while 80% of respondents confirmed clear pandemic plans, only 45% expressed confidence in staffing adequacy, 55% in surge planning realism, and just 45% confirmed regular drills. Qualitative analysis revealed workforce as the single greatest yet most underinvested vulnerability, supply chain fragility rooted in …

Trends Among Suspected Opioid Overdose Emergency Medical Service (Ems) Incidents In Georgia From 2019-2023, Ashton Harris

College of Graduate Studies: Theses & Dissertations

Opioid overdoses remain a problem in the United States, underscoring the need for additional surveillance tools to monitor trends in opioid overdoses. Emergency Medical Services (EMS) data is a timely surveillance method that captures more potential overdoses than hospitals by representing the pre-hospital setting. Research questions in the study assess EMS responses to suspect opioid overdose incidents from 2019-2023 in Georgia to encompass the following characteristics: timeframe (pre, during, post-pandemic), urban versus rural counties, race/ethnicity, categorical type of first responder, mean dosage of naloxone in milligrams administered, and death. 84,359 records meeting the inclusion criteria were initially retrieved from the …

Prenatal Exposure To Nicotine And Postpartum Depression: A Systematic Review And Meta-Analysis, Reem Sharaf-Alddin, May Salama, Denise Mckinney, George Saade, Qi Zhang

Health Behavior, Policy & Management Faculty Publications

Purpose: Postpartum Depression (PPD) is the most common mental health complication of childbirth, and has short-term and long-term consequences for mother, child, and the entire family. PPD is a function of several factors. Prenatal exposure to nicotine (PEN) by Active Tobacco Smoking (ATS), Secondhand Smoking (SHS), or Electronic Nicotine Products (ENPs) is a major potential risk factor. This systematic review and meta-analysis aim to summarize and evaluate all evidence regarding the association between PEN and PPD.

Methods: We searched the following databases, PubMed, Medline, Cochrane, EMBASE, and CINHAL, for studies published between Jan.1st ,2000&Sep.19th ,2024, with the outcome PPD. Studies …

Rurality, Infant Feeding Practices, And Perinatal Cardiovascular Health Behaviors, Elly Marie Marshall

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: Cardiovascular diseases are a leading cause of pregnancy-related deaths in the United States, with higher rates in rural areas. While limited healthcare access contributes to this disparity, other factors remain unclear. Breastfeeding provides long-term protection against cardiovascular disease, but modern infant feeding practices are complex and may impact maternal cardiovascular health (CVH) in unexpected ways. Healthy CVH behaviors of sufficient sleep duration, adequate physical activity, a healthy diet, and nicotine avoidance can enhance protection against future cardiovascular disease risk. Therefore, the aims of this dissertation are to 1) assess associations between rurality and first trimester CVH behaviors; 2) synthesize …

Spatial Analyses Using Emergency Medical Services Data To Inform Healthcare., Jeffrey Alan Pesarsick

Graduate Theses, Dissertations, and Problem Reports (ETD)

Spatial analyses using Emergency Medical Services data to inform healthcare.

Jeffrey Pesarsick

Background

Emergency Medical Services (EMS) often serve as the initial entry point for patients into the healthcare system in the United States.  Rural health disparities, geographic isolation, socioeconomic disadvantages, and operational challenges create disparities in access to EMS services.  Disparities include prolonged response times, less resources available, and inequities in levels of care available.  The overall goal of these series of projects was to quantify the extent to which operational challenges in EMS data impact health, and how EMS data could be used to identify neighborhood level trends …

Under-Five Mortality Estimation Methods: A Methodological Systematic Review, Bereket Kefale, Jonine Jancey, Amanuel T. Gebremedhin, Daniel Gashaneh Belay, Gavin Pereira, Gizachew A. Tessema

Research outputs 2022 to 2026

Purpose This methodological systematic review aimed to identify and synthesise the existing under-five mortality (U5M) estimation methods globally. Methods We searched seven databases including Medline, Embase, Scopus, Web of Science, CINAHL, Global Health, and ProQuest Central, as well as grey literature sources from inception to September 25, 2025. The review protocol was prospectively registered in the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42023465476). Results Fifty-six studies were included in this review. The most frequently employed child mortality estimation method was the indirect method (n = 16), followed by the Global Burden of Disease (GBD) study method (n = 12) …

Chronic Disease Prevalence And Modifiable Risk Factors Among Undergraduate Students At Ha’Il University: A Population-Level Cross-Sectional Study, Collins Otieno Asweto, Sehar Un Nisa Hassan, Mohamed Ali Alzain, Bandar Alsaif, Mohammed Elshiekh Saeed, Ahmed Kassar, Kamal Elbssir Mohammed Ali, Mouna Ghorbel, Rafat Zrieq, Monzer Hamed, Wei Wang

Research outputs 2022 to 2026

Background: Rising rates of chronic conditions among Saudi youth underscore the need for early prevention. Using a public‑health lens focused on demographic, academic, and lifestyle influences, this study investigates the risk and protective factors for chronic disease among students at the University of Ha’il to guide youth‑centered health policies and long‑term wellbeing initiatives. Methods: A cross-sectional survey was conducted among 10,775 undergraduate students studying in bachelor’s degree programs at Ha’il University, Saudi Arabia. Descriptive analyses were used to assess demographic characteristics, academic status, health status, and health-related lifestyles. Multiple logistic regression models were applied to determine which demographic, academic, and …

Understanding The Syphilis Resurgence Among Females Of Childbearing Age: Informing Prevention Efforts In New York State, Salvatore Currenti

Electronic Theses & Dissertations (2024 - present)

Syphilis is caused by Treponema pallidum and transmitted through direct contact with infected mucosal lesions and via vertical transmission during pregnancy (i.e., congenital). Transmission of syphilis to an infant during pregnancy (i.e., congenital syphilis [CS]) can lead to early fetal death, stillbirth, neonatal death, preterm birth, low birthweight, and congenital infection in infants. The United States (U.S.) is experiencing epidemic increases in both females of reproductive age with syphilis and infants with CS. In New York State (NYS), these trends have also occurred, especially after COVID-19 emergence, and increases in reported cases and incidence rates are comparable to national statistics. …

Associations Between Neighborhood Physical And Social Stressors During Sensitive Developmental Periods And Substance Use In Early Adulthood, Abigail M. Ulofoshio

Electronic Theses & Dissertations (2024 - present)

Background

Substance use is a major public health problem. Neighborhood disadvantage and related stressors have been linked to increased substance use in adolescence and early adulthood, although findings are mixed. No studies have explored whether the timing or accumulation of neighborhood stressors in childhood and adolescence impact substance use in early adulthood. This study aims to investigate to what extent physical and social neighborhood stress during sensitive developmental periods influence substance use dependency and illicit substance use in early adulthood.

Methods

We analyzed an imputed sample (n = 7,494) from the Avon Longitudinal Study of Parents and Children (ALSPAC), a …