Epidemiology Commons^™

Food Insecurity And Adiposity Among Children And Adults Nhanes 2015-2016, Denise Vidal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Obesity is a preventable disease that has been associated with many adverse health outcomes. A possible factor that may influence adiposity development is food insecurity. Although several epidemiological studies have been conducted examining the association between food insecurity and adiposity among children and adults, results have been inconsistent. Objective: This cross-sectional study investigates the relationship between food insecurity and adiposity among children and adults using recent data from a representative sample of the US population. Methods: We examined 3,391 adults and 2,837 children from the National Health and Nutrition Examination Survey (NHANES) 2015-2016. Household food insecurity was assessed using …

Does Social Support Moderate The Association Between Income And Food Security Status Among Seniors Living In Southern Nevada?, Adugna Teka Siweya

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Income is the strongest predictor of food insecurity among seniors, and social support also an essential factor to help mitigate the effects of food insecurity. However, little is known about the potential role that social support may play as a moderator of the association between income and food insecurity. Thus, we aim to examine social support as a moderator for the relationship between income and food insecurity among seniors. Methods: Logistic regression models were used to analyze data collected in 2019 from seniors residing in Southern Nevada. Predictors of food insecurity, sociodemographic factors, social support variables, and income and …

Changes In Body Mass Index Among Antiretroviral Therapy Naïve People Living With Hiv In Southeastern Nigeria, John O. Olawepo, Jennifer R. Pharr, Chad L. Cross, Babayemi O. Olakunde, Chinedu Aniekwe, Mercy Niyang, Raisa Kabir, Ayodotun Olutola

Environmental & Global Health Faculty Research

The proportion of people living with HIV (PLHIV) who are overweight or obese is rising, leading to a double epidemic of HIV and obesity. The purpose of this retrospective longitudinal study was to examine changes in body mass index (BMI) among PLHIV who were new to antiretroviral therapy (ART) in two states in Southeastern Nigeria. The BMI at baseline and 12 months were compared and the difference in proportions in each BMI category was tested. The association between the BMI at 12 months and the demographic and/or clinical variables was examined using multiway analysis of covariance. The study included 2,146 …

Modeling Covid-19 Infection Rates Using Sir And Arima Models, Janelle Domantay, Ilya Pivavaruk, Victor Taksheyev

Undergraduate Research Symposium Posters

With the onset of the COVID-19 pandemic, it has become of increasing interest to both monitor and predict the growth of its infection rates. In order to analyze the accuracy of epidemiological prediction, we consider two different models for prediction, the Susceptible Infected and Removed (SIR), and Autoregressive Integrated Moving Average (ARIMA) models. Using a dataset of Clark County COVID-19 infections, we create various ARIMA and SIR models that attempt to predict the progression of COVID-19 infections whilst comparing these predictions to the dataset. We observed that the ARIMA model performed more accurately overall, having a much lower Root Mean …

Differences In Rapid Increases In County-Level Covid-19 Incidence By Implementation Of Statewide Closures And Mask Mandates — United States, June 1–September 30, 2020, Sharoda Dasgupta, Ahmed M. Kassem, Gregory Sunshine, Tiebin Liu, Charles Rose, Gloria J. Kang, Rachel Silver, Brandy L.Peterson Maddox, Christina Watson, Mara Howard-Williams, Maxim Gakh, Russell Mccord, Regen Weber, Kelly Fletcher, Trieste Musial, Michael A. Tynan, Rachel Hulkower, Amanda Moreland, Dawn Pepin, Lisa Landsman, Amanda Brown, Siobhan Gilchrist, Catherine Clodfelter, Michael Williams, Ryan Cramer, Alexa Limeres, Adebola Popoola, Sebnem Dugmeoglu, Julia Shelburne

Environmental & Global Health Faculty Research

Background and Objective: Community mitigation strategies could help reduce COVID-19 incidence, but there are few studies that explore associations nationally and by urbanicity. In a national county-level analysis, we examined the probability of being identified as a county with rapidly increasing COVID-19 incidence (rapid riser identification) during the summer of 2020 by implementation of mitigation policies prior to the summer, overall and by urbanicity. Methods: We analyzed county-level data on rapid riser identification during June 1–September 30, 2020 and statewide closures and statewide mask mandates starting March 19 (obtained from state government websites). Poisson regression models with robust standard error …

Trends In Osteoporosis And Mean Bone Density Among Type 2 Diabetes Patients In The Us From 2005 To 2014, Yingke Xu, Qing Wu

School of Public Health Faculty Research

© 2021, The Author(s). This study aimed to examine how bone health changed among T2DM patients in the past decade. Continuous National Health and Nutrition Examination Survey (NHANES) data from 2005–2006 to 2013–2014 were analyzed to examine the trends of bone mineral density (BMD) and the prevalence trends of osteoporosis osteopenia among T2DM patients and non-diabetic people aged 40 years and older. The age- and BMI-adjusted mean BMD of the femur neck for the four NHANES cycles decreased linearly in both T2DM patients and non-diabetic people (both Plinear trend ≤ 0.009). Among women with T2DM, the mean BMD in 2013–2014 …

Gardasil Vaccine Trends Within Nevada, California, And The U.S.: A Comparative Study, Karen S. Gutierrez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite decreasing incidence in cervical cancer in the U.S., there continues to be an increase in public health concern for cervical cancer worldwide. Recent studies report that individuals are disproportionately affected based on region, sex, and race. Additionally, the human papillomavirus (HPV) attributable cancers may be reduced between 70% and 90% through the universal use of HPV-vaccines. In order to expand current knowledge and implement intervention programs in Nevada, it is critical to examine the associations among the Gardasil vaccine, cervical cancer screening, and adverse events following immunization as well as to understand the different socio-demographic subgroups affected. To our …

Flame Retardants And Neurodevelopment: An Updated Review Of Epidemiological Literature, Ann M. Vuong, Kimberly Yolton, Kim M. Cecil, Joseph M. Braun, Bruce P. Lanphear, Aimin Chen

School of Public Health Faculty Research

Purpose of Review: Flame retardant (FR) compounds can adversely impact neurodevelopment. This updated literature review summarizes epidemiological studies of FRs and neurotoxicity published since 2015, covering historical (polybrominated biphenyls [PBBs], polychlorinated biphenyls [PCBs]), contemporary (polybrominated diphenyl ethers [PBDEs], hexabromocyclododecane [HBCD], and tetrabromobisphenol A [TBBPA]), and current-use organophosphate FRs (OPFRs) and brominated FRs (2-ethylhexyl 2,3,4,5-tetrabromobezoate [EH-TBB] TBB), bis(2-ethylhexyl) tetrabromophthalate [BEH-TEBP]), focusing on prenatal and postnatal periods of exposure. Recent Findings: Continuing studies on PCBs still reveal adverse associations with child cognition and behavior. Recent studies indicate PBDEs are neurotoxic, particularly for gestational exposures with decreased cognition and increased externalizing behaviors. Findings …

Effects Of Β-Carotene Intake On The Risk Of Fracture: A Bayesian Meta-Analysis, Tesfaye Getachew Charkos, Yawen Liu, Kemal Sherefa Oumer, Ann M. Vuong, Shuman Yang

School of Public Health Faculty Research

Background: Epidemiological studies examining the association between β-carotene intake and risk of fracture have reported inconsistent findings. We conducted a meta-analysis to investigate the association between β-carotene intake and risk of fracture. Methods: We systematically searched PubMed, EMBASE and Cochrane library databases for relevant articles that were published until December 2019. We also identified studies from reference lists of articles identified from the clinical databases. The frequentist and Bayesian random-effects model was used to synthesize data. Results: Nine studies with a total of 190,545 men and women, with an average age of 59.8 years, were included in this meta-analysis. For …

Sex Differences In Risk Factors For Oral And Pharyngeal Cancer Among Puerto Rican Adults, Maira A. Castaneda-Avila, Cynthia Perez, Jose Vivaldi, Elba C. Díaz, Hilmaris Centeno, Ana P. Ortiz

Journal of Health Disparities Research and Practice

Background: Oral and pharyngeal cancer (OPC) is a frequent type of cancer in Puerto Rico, with the risk being higher in men relative to women. We assessed differences in OPC risk factors implicated in these sex disparities.

Methods: We analyzed data of 740 adult participants (40-65 years) from the San Juan Overweight Adults Longitudinal Study (SOALS). A comprehensive questionnaire was administered to collect information on sociodemographic characteristics, cigarette smoking, binge drinking, oral high-risk HPV infection, fruit and vegetable consumption, sexual behavior, and oral hygiene practices. A full-mouth periodontal examination was also performed. Sixteen OPC known and potential risk factors were …

Correction To: Temporal Trend Of Research Related To Gun Violence From 1981 To 2018 In The United States: A Bibliometric Analysis, Lung-Chang Chien, Maxim Gakh, Courtney Coughenour, Ro-Ting Lin

School of Public Health Faculty Research

No abstract provided.

Oral Localization Of Scardovia Wiggsiae, Graydon Ramos Carr

UNLV Theses, Dissertations, Professional Papers, and Capstones

Early childhood caries is one of the most prevalent diseases in the United States among children. The formation of caries is a complex, multifactorial process that is still being studied. Researchers have thought for years that Streptococcus mutans was the primary causative agent of early childhood caries. The recent discovery of a novel cariogenic pathogen, Scardovia wiggsiae and its significant contribution to the etiology of early childhood caries has led oral health researchers to re-evaluate this microorganism and its link to this disease. While there have been several projects undertaken within the University of Nevada, Las Vegas School of Dental …

Investigating Attitudes And Beliefs Of University Students Aged 18 To 24 Years That Influence Their Decision To Take Pre-Exposure Prophylaxis Medication, Philip Danquah

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Contemporary research findings affirm that young adults aged 18 to 24 years have high prevalence of new HIV infections. Pre-Exposure Prophylaxis (PrEP) medication is the latest strategy in HIV prevention. Rates of PrEP uptake or use have been negligible among university students aged 18 to 24 years, especially among racial and ethnic minority students.

Objective: The objective of this study is to investigate the attitudes and beliefs that influence the uptake of PrEP medications and the HIV risk behaviors associated with the willingness to take PrEP medications among university students aged 18 to 24 years attending the University of …

Temporal Trend Of Research Related To Gun Violence From 1981 To 2018 In The United States: A Bibliometric Analysis, Lung-Chang Chien, Maxim Gakh, Courtney Coughenour, Ro-Ting Lin

School of Public Health Faculty Research

Background: We aimed to evaluate the variation in gun violence-related research in the US over time to determine if there are meaningful changes in frequency of research at certain time points. Related publications were searched from the Web of Science. Methods: We searched articles from Web of Science to collect publication data of gun violence research in three disciplines (clinical sciences, life sciences, and social behavior sciences) from 1981 to 2018. The joinpoint regression approach was applied to evaluate the trend of publication ratio. We also adopted the generalized additive mixed model to compare the publication ratio among the three …

Spatiotemporal Epidemiology Of Varicella In Chongqing, China, 2014-2018, Hua Zhu, Han Zhao, Rong Ou, Qing Zeng, Ling Hu, Hongfang Qiu, Manoj Sharma, Mengliang Ye

Environmental & Global Health Faculty Research

Although immunization against varicella using vaccines has been proven to be significant and effective in the past decades, varicella remains a major public health concern for many developing countries. Varicella vaccination has not been introduced into routine immunization programs in China, and varicella outbreaks have continued to occur. Taking the city of Chongqing, which has a high prevalence of varicella, as an example, this study explored the spatiotemporal epidemiology of varicella. Based on the reported data of varicella cases from 1 January 2014 to 31 December 2018 in Chongqing, hot spots and space-time clusters of varicella were identified using spatial …

Does Age Affect The Association Between Race/Ethnicity And Hpv Screening: A Retrospective Cohort Study Of United States Women, Keila L. Marlin, Mph, Larissa R. Brunner Huber, Ph.D.

Journal of Health Disparities Research and Practice

Many studies have demonstrated disparities in awareness of and knowledge about human papillomavirus (HPV) among young, immigrant, and minority populations. Yet, there is a lack of existing research that has investigated the role of race/ethnicity and HPV screening, and how it varies by age. The purpose of this study was to evaluate this association using 2016 Behavioral Risk Factor Surveillance System (BRFSS) data. This study included 120,646 women who self-reported information on race/ethnicity, HPV screening, and age. Logistic regression was used to obtain odds ratios (OR) and 95% confidence intervals (CIs). A stratified analysis was conducted to determine if age …

Substance Abuse Treatment In Correctional Versus Non-Correctional Settings: Analysis Of Racial/Ethnic And Gender Differences, George Pro, Ricky Camplain, Samantha Sabo, Julie Baldwin, Paul A. Gilbert

Journal of Health Disparities Research and Practice

Background

Alcohol and drug abuse are widespread in the US. Substance abuse treatment services are effective, but utilization of services is low, particularly among African Americans, Hispanics, and women. Substance abuse is strongly associated with incarceration, and African Americans and Hispanics make up a disproportionate percentage of individuals with substance abuse problems involved in the criminal justice system. High treatment need, low treatment uptake, and the association between substance abuse and incarceration have led, in part, to correctional institutions filling the treatment gap by increasingly providing safety-net treatment services. We sought to better understand racial/ethnic and gender differences in determinants …

An Evaluation Of Factors Associated With The Perceptions Of Diabetes In A Filipino American Sample Residing In Clark County, Nevada, Lawrence Nartatez Sagadraca

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study assessed beliefs about the contribution of the Filipino diet and genetics to diabetes burden and its ability to control it without medical interventions. The data from a need’s assessment survey of 200 Filipino Americans residing in Clark County, Nevada, were analyzed by using the logistic regression model. A significant proportion of the participants believed that diabetes is a problem in the Filipino community (79%) and is related to the Filipino diet (75%) and genetics (69.0%), and that it can be controlled without medical intervention (52.4%). In univariate analyses, age (Odds ratio [OR]: 1.03, 95% confidence interval [CI]: 1.01 …

Evaluating Parents Sociodemographic Factors And Childhood Vaccine Decisions, Mehret Girmay

UNLV Theses, Dissertations, Professional Papers, and Capstones

Vaccination is considered one of the most successful public health achievements of the 20th century. However, with increasing vaccine skepticism emerging over the past decades, there is a threat to the ongoing sustainment of vaccine coverage within all US communities. This study evaluated and compared parents’ sociodemographic factors associated with childhood vaccine decisions. This study is a secondary analysis of 893 parents/guardians, age 18-55 years with child(ren) < 7 years living in the U.S.

Predictive analysis was conducted using multinomial logistic regression modeling was used to examine vaccine decisions (accept, hesitant, and refuse) in relation to parents’ sociodemographic factors. Overall, (66.6%) of parents accepted recommended vaccines, while …

Identifiying High Risk Areas Of Zika Virus Infection By Meteorological Factors In Columbia, Lung-Chang Chien, Francisco Sy, Adriana Perez

Environmental & Global Health Faculty Research

Background Several Zika virus (ZIKV) outbreaks have occurred since October 2015. Because there is no effective treatment for ZIKV infection, developing an effective surveillance and warning system is currently a high priority to prevent ZIKV infection. Despite Aedes mosquitos having been known to spread ZIKV, the calculation approach is diverse, and only applied to local areas. This study used meteorological measurements to monitor ZIKV infection due to the high correlation between climate change and Aedes mosquitos and the convenience to obtain meteorological data from weather monitoring stations. Methods This study applied the Bayesian structured additive regression modeling approach to include …

Factors Associated With Eosinophilic Esophagitis In Nevada, Julia Lorraine Anderson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Eosinophilic esophagitis (EoE) is a rare immune-mediated illness with symptoms that range from difficulty swallowing to food impaction of the esophagus. Most published studies have been documented among patients residing in cool regions with significant annual rainfall. No published studies to our knowledge have been performed examining the healthcare utilization trends of EoE in Nevada. Utilizing two unique databases, the factors associated with EoE healthcare utilization patterns in Nevada were examined. All analyses were performed in R version 3.5.1. This study included a demographic and regional analysis identifying risk factors associated with having an EoE healthcare visit in Nevada. Several …

"Courage 2 Test": An Evaluation Of A Social Media Marketing Campaign To Increase Hiv Testing Among Young Black Men, Jamal T. Jones, Laura F. Salazar, Richard A. Crosby

Journal of Health Disparities Research and Practice

The purpose of this study was to evaluate a social media marketing (SMM) campaign designed to increase HIV testing among young Black men attending a public university in Atlanta, GA. “Courage 2 Test” was a three-month SMM campaign (launched from February 2017 to April 2017) that included targeted Facebook and Instagram advertisements to encourage HIV testing. Students completed an online survey via two cross-sectional samples (n=106 at baseline and n=98 post campaign). Campaign evaluation involved assessing the effects of campaign exposure and the pre/post-grouping variable on ever testing for HIV and testing for HIV in the previous six months via …

Determinants Of Disparities In The Colorectal Cancer Burden, Karen Elizabeth Callahan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Colorectal cancer (CRC) is the third leading cause of cancer incidence and mortality in the United States, with an estimated 140,000 new cases and 51,000 deaths expected in 2018. Like most cancers, the burden of CRC is unequally distributed among population groups. The current dissertation included two studies filling gaps in knowledge about CRC disparities. Study 1 characterized the relationship between educational attainment and CRC mortality by race/ethnicity. Six years of CRC mortality data (2012-2017) from the diverse state of California, with 30,180 deaths were analyzed. Sex-specific mortality rate ratios (MRR) stratified by race/ethnicity as well as by educational level …

Telomeres, Nutrition And Mortality: Risk Factors For The Rate Of Telomere Length Decline And The Associations Between Telomere Length, Nutrition And Mortality, Saruna Ghimire

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Telomeres are nucleoprotein structures located at the ends of eukaryotic chromosomes, thought to protect the DNA from damage. As a person experiences stressors, harmful exposures, and other diseases throughout their life, telomeres are thought to become damaged and their length shortened, decreasing their ability to protect the DNA. Nutrition is an important aspect of healthy aging. Preservation of telomere length (TL) is thought to be one of the mechanisms by which good nutrition can delay or prevent the development of chronic disease and death. Recent evidence of preservation of TL with good nutrition is promising. Thus, the aim of …

Health Disparities Among Sexual And Gender Minorities, Jennifer Keeley

UNLV Theses, Dissertations, Professional Papers, and Capstones

Decades of research has shown that sexual and gender minorities (SGMs) experience adverse health and mental health outcomes to a greater extent than their heterosexual peers. The need to better understand and eliminate health disparities in the SGM population was recognized by the National Institute on Minority Health and Health Disparities (NIMHD) at NIH. The Secretary of Health at the Department of Health and Human Services approved the designation of the SGM population as a health disparities population in 2016 and called for SGM studies to examine the health needs of the SGM population across SGM subgroups via large representative …

An Analysis Of Postmastectomy Breast Reconstruction Due To Breast Cancer In Nevada And The United States From 2008-2013, Jenna Webb

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: In the United States, female breast cancer was the leading cause of new cancer cases from 2011-2015. Since the Women’s Health and Cancer Act of 1998 (WHCRA), the federal government mandates employee and private health insurance providers to cover breast reconstruction if they cover mastectomies. Postmastectomy breast reconstruction (PBR) rates increased after the WHCRA, but these rates have remained relatively low throughout recent years. Objective: The objective of this study was to determine factors associated with women having PBR due to breast cancer in Nevada and the United States from 2008 to 2013. Methods: Using two HCUP database, NIS …

Social Vs. Practical Problems In Attaining A Colonoscopy: Different Patient Profiles?, Barbara A. Curbow, Evelyn C. King-Marshall, Nora Mueller, Travis Hyams, Shahnaz Sultan, Thomas J. George Jr

Journal of Health Disparities Research and Practice

Background: Colonoscopy is an effective procedure for identifying precancerous polyps and cancerous lesions, but it is unlike other cancer screening tools in that it requires sedation and thus assistance from at least one other individual. The intent of this paper was to identify logistical problems in completing the colonoscopy and to examine their relationships with sociodemographic characteristics.

Methods: All eligible patients (n = 2500) from two academic-affiliated colonoscopy centers (one free standing, one hospital-based) were invited to participate in an onsite, pre-colonoscopy survey; patients agreeing to participate (n = 1841, RR = 73.6%) received a $5.00 gift card. Multiple correspondence …

Comparison Of Compliance With Cervical Cancer Screening Among Women Aged 18 And Above In Arkansas And The United States, Sarah N. O'Connor, Jun Tao, L. Joseph Su

Journal of Health Disparities Research and Practice

Introduction: Cervical cancer preys on women without access to preventative screening. Any woman who has developed an invasive case of cervical cancer should be regarded as a failure of screening. Disparities in access to screening, triage, and treatment fuel an uneven distribution in the burden of cervical cancer within the United States; weighing unusually heavy on the Southern States like Arkansas. The purpose of this study was to evaluate demographic and behavioral risk factors for cervical cancer and identify potential barriers which may influence the likelihood of complying with current Pap test recommendations on a state level, in Arkansas, and …

Prehypertensive Risk Among African-American Undergraduates: Do The Extra Pounds Really Matter?, Cecile N. Yancu, Amber Debono, Anna K. Lee, Correll Mcrae, Daphne Witherspoon

Journal of Health Disparities Research and Practice

The objective of this study is to examine prehypertension among young African American adults and evaluate the predictive value of easily obtained standard measures of adiposity. Data for this study of 155 primarily African-American undergraduates was collected between April 2010-11. Participants provided family health history and anthropometric measures, including body weight, body mass index (BMI), and waist to hip (WHR) ratio. Percentages were calculated for demographics. The average systolic blood pressure measured over two time periods within a single semester generated prehypertension rates. Univariate and multivariate logistic regression examined the impact of BMI, WHR, weight, and family medical history on …

Air Pollution Related Asthma Inpatient Hospital Admission In The Las Vegas Valley, Joshua Allen Jensen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Asthma is a chronic respiratory condition characterized by inflammation in the lungs that causes airflow to be restricted. In Southern Nevada’s Las Vegas Valley, the natural basin geography causes air pollutants to accumulate. Research has linked air pollution with worsening asthma symptoms. The goal of this study was to determine the non-linear lagged relationship between Asthma Related Inpatient Hospital Admissions (ARIHA) and the Environmental Protection Agency’s (EPA) criteria air pollutants in the Las Vegas Valley using hospital and pollution monitoring station data. Overall, a statistically significant increased RR of ARIHA between 7 and 13 days after exposure to PM2.5 24-hour …