Epidemiology Commons^™

Dna Methylation And Its Association With Prenatal Exposures And Pregnancy Outcomes, Jennifer Straughen

USF Tampa Graduate Theses and Dissertations

Altered DNA methylation may lead to suboptimal fetal programming, increasing the risk of adverse pregnancy outcomes such as small for gestational age (SGA); however, few studies have examined the associations between DNA methylation, prenatal exposures, and fetal outcomes. Cross-sectional data from a larger, ongoing study were used to assess the impact of prenatal smoking on gene specific methylation of umbilical cord blood derived DNA and to investigate the association between gene-specific methylation and risk of SGA. The association between gene-specific DNA methylation and birthweight was also assessed. Maternal and infant covariates were abstracted from medical records, cigarette smoke exposure was …

Evaluation Of Common Inherited Variants In Mitochondrial-Related And Microrna-Related Genes As Novel Risk Factors For Ovarian Cancer, Jennifer Permuth Wey

USF Tampa Graduate Theses and Dissertations

Epithelial ovarian cancer (EOC) is a leading cause of morbidity and mortality among women in the United States, and the etiology is incompletely understood. Common, low penetrant genetic variants such as single nucleotide polymorphisms (SNPs) likely contribute to a significant proportion of EOC. We examined whether SNPs in two understudied yet biologically important types of genes, mitochondrial-related and miRNA-related genes, may contribute to EOC susceptibility using data from a large, homogeneous study population of 1,815 EOC cases and 1,900 controls (frequency-matched on age-group and race/ethnicity) genotyped through stage 1 of an ongoing genome-wide association study. Inter-individual variation in genes involved …

Gangguan Akibat Kekurangan Yodium Pada Wanita Usia Subur Di Kecamatan Baturaden Kabupaten Banyumas, Jawa Tengah, Endo Dardjito, Setiyowati Rahardjo

Kesmas

Gangguan Akibat Kekurangan Yodium (GAKY) merupakan salah satu masalah gizi di Kabupaten Banyumas. GAKY disebabkan oleh defisiensi kronik asupan yodium, konsumsi goitrogenik, penggunaan kontrasepsi KB hormonal, faktor genetik, dan pengetahuan penderita. Prevalensi penyakit gondok di Kecamatan Baturaden, Kabupaten Banyumas, terus meningkat mencapai 35,38% pada tahun 2007 sehingga daerah ini tergolong endemis berat GAKY. Untuk menganalisis faktor-faktor risiko GAKY di Kecamatan Baturaden, suatu penelitian penjelasan dengan desain kasus kontrol telah dilakukan dengan melibatkan 30 orang wanita usia subur (15-45 tahun) yang menderita GAKY sebagai kasus dan 30 orang WUS lain yang tidak menderita GAKY sebagai sebagai kontrol. Kedua kelompok adalah penduduk …

Mathematical Modeling, Simulation, And Time Series Analysis Of Seasonal Epidemics., Eric Shu Numfor

Electronic Theses and Dissertations

Seasonal and non-seasonal Susceptible-Exposed-Infective-Recovered-Susceptible (SEIRS) models are formulated and analyzed. It is proved that the disease-free steady state of the non-seasonal model is locally asymptotically stable if R_v < 1, and disease invades if R_v > 1. For the seasonal SEIRS model, it is shown that the disease-free periodic solution is locally asymptotically stable when R̅_v < 1, and I(t) is persistent with sustained oscillations when R̅_v > 1. Numerical simulations indicate that the orbit representing I(t) decays when R̅_v < 1 < R_v. The seasonal SEIRS model with routine and pulse vaccination is simulated, and results depict an unsustained decrease …

Coronary Heart Disease Mortality And Long-Term Exposure To Ambient Particulate Air Pollutants In Elderly Nonsmoking California Residents, Lie Hong Chen

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study is to assess the effect of long-term concentrations of ambient PM on risks of all causes, cardiopulmonary, coronary heart disease (CHD), total cancer, and any mention of nonmalignant respiratory disease (NMRD) mortality.

The health effects of long-term ambient air pollution have been studied with up to 30 years of follow-up in the AHSMOG cohort, a cohort of 6,338 nonsmoking white California adults. Monthly concentrations of ambient air pollutants [particulate matter(PMio), Ozone (O3), sulfur dioxide (SO2), nitrogen dioxide (NO2) or particulate matter

In the AHSMOG cohort, each increment of 10 |ig/m3 in PMio in two-pollutant models …

The Role Of Ambient Air Pollution In The Occurrence Of Emphysema, Shiva Metghalchi

Loma Linda University Electronic Theses, Dissertations & Projects

Emphysema is the most common cause of death from respiratory disease in the United States. Emphysema is most common among people aged 50 and older. Those with a genetic predisposition to emphysema may experience the onset as early as their thirties or forties. Men are more likely than women to develop emphysema, but female cases are increasing as the number of female smokers rises.

In the past few years, etiological and pathogenic research has been carried out in an attempt to determine the reason for an increase in deaths and other health problems associated with air pollution, and there have …

The Determinants Of Colorectal Cancer Survival Disparities In Nevada, Lucas N. Wassira

UNLV Theses, Dissertations, Professional Papers, and Capstones

Different population groups across Nevada and throughout the United States suffer disproportionately from colorectal cancer and its after-effects. Overcoming cancer health disparities is important for lessening the burden of cancer. There has been an overall decline in the incidence of and mortality from colorectal cancer (CRC). This is likely due, in part, to the increasing use of screening procedures such as Fecal Occult Blood Test (FOBT) and/or endoscopy, which can reduce the risk of CRC mortality by fifty percent. Nevertheless, screening procedures are routinely used by only fifty percent of Americans aged fifty years and older. Despite overall mortality decreasing …

Exploring Relationships Between Racism, Housing And Child Illness In Remote Indigenous Communities, Naomi Priest, Yin Paradies, Matthew Stevens, Ross Bailie

Aboriginal Policy Research Consortium International (APRCi)

Background Although racism is increasingly acknowledged as a determinant of health, few studies have examined the relationship between racism, housing and child health outcomes. Methods Cross-sectional data from the Housing Improvement and Child Health study collected in ten remote indigenous communities in the Northern Territory, Australia were analysed using hierarchical logistic regression. Carer and householder self-reported racism was measured using a single item and child illness was measured using a carer report of common childhood illnesses. A range of confounders, moderators and mediators were considered, including socio-demographic and household composition, psychosocial measures for carers and householders, community environment, and health-related …

Minimum Description Length And Empirical Bayes Methods Of Identifying Snps Associated With Disease, Ye Yang, David R. Bickel

COBRA Preprint Series

The goal of determining which of hundreds of thousands of SNPs are associated with disease poses one of the most challenging multiple testing problems. Using the empirical Bayes approach, the local false discovery rate (LFDR) estimated using popular semiparametric models has enjoyed success in simultaneous inference. However, the estimated LFDR can be biased because the semiparametric approach tends to overestimate the proportion of the non-associated single nucleotide polymorphisms (SNPs). One of the negative consequences is that, like conventional p-values, such LFDR estimates cannot quantify the amount of information in the data that favors the null hypothesis of no disease-association.

We …

The Handling Of Missing Data In Molecular Epidemiologic Studies, Manisha Desai, Jessica Kubo, Denise Esserman, Mary Beth Terry

COBRA Preprint Series

Background: Molecular epidemiologic studies face a missing data problem as biospecimen data are often collected on only a proportion of subjects eligible for study.

Methods: We investigated all molecular epidemiologic studies published in CEBP in 2009 to characterize the prevalence of missing data and to elucidate how the issue was addressed. We considered multiple imputation (MI), a missing data technique that is readily available and easy to implement, as a possible solution.

Results: While the majority of studies had missing data, only 16% compared subjects with and without missing data. Furthermore, 95% of the studies with missing data performed a …

The Use Of Multiple Imputation In Molecular Epidemiologic Studies Assessing Interaction Effects, Manisha Desai, Denise Esserman, Marilie Gammon, Mary Beth Terry

COBRA Preprint Series

Background: In molecular epidemiologic studies biospecimen data are collected on only a proportion of subjects eligible for study. This leads to a missing data problem. Missing data methods, however, are not typically incorporated into analyses. Instead, complete-case (CC) analyses are performed, which result in biased and inefficient estimates.

Methods: Through simulations, we characterized the bias that results from CC methods when interaction effects are estimated, as this is a major aim of many molecular epidemiologic studies. We also investigated whether standard multiple imputation (MI) could improve estimation over CC methods when the data are not missing at random (NMAR) and …

The Pathways To Mental Health Care Of First-Episode Psychosis Patients: A Systematic Review., Kelly K. Anderson, Rebecca Fuhrer, Ashok K. Malla

Epidemiology and Biostatistics Publications

BACKGROUND: Although there is agreement on the association between delay in treatment of psychosis and outcome, less is known regarding the pathways to care of patients suffering from a first psychotic episode. Pathways are complex, involve a diverse range of contacts, and are likely to influence delay in treatment. We conducted a systematic review on the nature and determinants of the pathway to care of patients experiencing a first psychotic episode.

METHOD: We searched four databases (Medline, HealthStar, EMBASE, PsycINFO) to identify articles published between 1985 and 2009. We manually searched reference lists and relevant journals and used forward citation …

The Health Of Latinos In Massachusetts: A Snapshot, Dharma Cortés, Rodolfo R. Vega

Gastón Institute Publications

People’s health outcomes are shaped in part by non-biological factors. Most immediately, limited access to health care services can have a deleterious impact on individuals’ health outcomes (Andrulis, 1998). In turn, access to healthcare services is influenced by socioeconomic factors such as whether a person has health insurance or the financial means to pay for their health care. Familiarity with the health care system is another important factor that may influence an individual’s access to healthcare services (Morgan et al., 2008). Language also plays an important role in health outcomes. For instance, individuals with limited English proficiency may find it …

Concurrent Sexual Partnerships Do Not Explain The Hiv Epidemics In Africa: A Systematic Review Of The Evidence, Larry Sawers, Eileen Stillwaggon

Economics Faculty Publications

The notion that concurrent sexual partnerships are especially common in sub-Saharan Africa and explain the region’s high HIV prevalence is accepted by many as conventional wisdom. In this paper, we evaluate the quantitative and qualitative evidence offered by the principal proponents of the concurrency hypothesis and analyze the mathematical model they use to establish the plausibility of the hypothesis.

We find that research seeking to establish a statistical correlation between concurrency and HIV prevalence either finds no correlation or has important limitations. Furthermore, in order to simulate rapid spread of HIV, mathematical models require unrealistic assumptions about frequency of sexual …

The Efficacy Of Spirometry As A Screening Tool In Detection Of Air Flow Obstruction, Nabeel Manzar, A. Suleman Haque, Bushra Manzar, Muhammad Irfan

Section of Pulmonary & Critical Care

Background/Objectives: In developing countries, spirometry has not been considered a part of routine medical check-up. The purpose of the study was to establish the usefulness of spirometry as a primary screening tool in detecting air flow obstruction (AFO) during routine medical check-up (RMC). Methods: This was a hospital based, retrospective, non-randomized case series study of 3696 participants, who presented to hospital for routine medical check-up. All subjects were assisted at the Pulmonary Medicine Department, from January 2003 till December 2008 who, having met other inclusion criteria, underwent spirometry. Data were analyzed using proportion, group means, standard deviations and …

Kie Untuk Peningkatan Pengetahuan, Sikap, Dan Praktik Pencegahan Dan Penanggulangan Penyakit Flu Burung Di Kabupaten Gowa, Sulawesi Selatan, Ridwan M. Said, M. Ridwan Thaha, M. Syafar

Kesmas

Avian influenza adalah suatu kejadian luar biasa yang disebabkan oleh virus influenza subtipe H5N1, ditularkan oleh ternak liar atau domestik dan kemungkinan menyerang manusia. Tujuan penelitian ini untuk mengungkapkan peningkatan pengetahuan masyarakat , perubahan sikap dan partisipasi masyarakat dalam pencegahan dan penanganan influenza di Kabupaten Bontonompo, Gowa. Desain riset adalah desain kuantitatif kuasi eksperimen. Penelitian ini dilakukan pada 120 peternak unggas sebagai sampel yang dipilih dengan metode purposive sampling dan menggunakan metoda analisis uji statistic T-Test. Penelitian membuktikan bahwa sebelum intervensi model pendidikan komunikasi informasi dilakukan, pengetahuan, sikap dan praktik pencegahan dan pengendalian avian influenza terbatas. Setelah intervensi informasi, pendidikan …

Surrogate Screening Models For The Low Physical Activity Criterion Of Frailty, Sandrah P. Eckel, Karen Bandeen-Roche, Paulo H.M. Chaves, Linda P. Fried, Thomas A. Louis

Johns Hopkins University, Dept. of Biostatistics Working Papers

Background and Aims. Low physical activity, one of five criteria in a validated clinical phenotype of frailty, is assessed by a standardized questionnaire on up to 20 leisure time activities. Because of the time demanded to collect the interview data, it has been challenging to translate to studies other than the Cardiovascular Health Study (CHS), for which it was developed. Considering subsets of activities, we identified and evaluated streamlined surrogate assessment methods and compared them to one implemented in the Women’s Health and Aging Study (WHAS).

Methods. Using data on men and women ages 65 and older from the CHS, …

Adherence To The American College Of Surgeons (Acs) Recommendation On Double Gloving, Hand Free Zone And Blunt Suture Needle Use Among Surgeon Ranks, Akbar Nassiry

Theses and Dissertations

Background: The American College of Surgeons guidelines suggest the use of intact gloves, double gloving, hands-free zone technique to pass sharp instruments, and blunt tip suture needles to protect patients, as well as the surgical team. This study estimates the extent to which these guidelines are followed in a large academic health system. Methods: Over a two-month period in the spring of 2010, 320 general surgical attendings, subspecialty surgical attendings, and surgical resident physicians practicing at a large academic health system, were approached during or after surgical conferences to participate in a cross-sectional study. Nearly 1/3rd completed an anonymous and …

Growth, Immune And Viral Responses In Hiv Infected African Children Receiving Highly Active Antiretroviral Therapy: A Prospective Cohort Study., Philippa M. Musoke, Peter Mudiope, Linda N. Barlow-Mosha, Patrick Ajuna, Danstan Bagenda, Michael M. Mubiru, Thorkild Tylleskar, Mary G. Fowler

Journal Articles: Epidemiology

BACKGROUND: Scale up of paediatric antiretroviral therapy in resource limited settings continues despite limited access to routine laboratory monitoring. We documented the weight and height responses in HIV infected Ugandan children on highly active antiretroviral therapy and determined clinical factors associated with successful treatment outcomes.

METHODS: A prospective cohort of HIV infected children were initiated on HAART and followed for 48 weeks. Body mass index for age z scores(BAZ), weight and height-for-age z scores (WAZ & HAZ) were calculated: CD4 cell % and HIV-1 RNA were measured at baseline and every 12 weeks. Treatment outcomes were classified according to; both …

Contextualizing The Health Belief Model And The Social Epidemiology Theories In The Study Of Aids In Malawi, Kumbirai Madondo

All Theses

The association between HIV/AIDS knowledge, risk perception and risky sexual behavior remains a valuable area of study among scholars seeking to understand the AIDS epidemic in Africa. Past research has focused only on either the Health Belief Model or social epidemiology ideas to understand AIDS but never combined the two. The current study is unique and adds to the body of knowledge by making use of both the Health Belief Model and social epidemiology ideas to understand these relationships more clearly and, more importantly, to explore the role that keeping AIDS a secret has in the contexts of risk perception, …

The Role Of Unrealistic Optimism In Explaining Preventive Behaviors In High Versus Low Endemic Malaria Settings In Belize, Daniel G. Handysides

Loma Linda University Electronic Theses, Dissertations & Projects

Background: Of all the diseases an individual can encounter in the world, malaria is one of the most destructive. Simple measures like sleeping under a bednet would greatly reduce the burden (Abeku, 2007). When people estimate their risk relative to others, they are most often unrealistically optimistic, which may explain why those at risk often fail to perform behaviors, such as using a bednet that will reduce their risk. However, one study showed that people at high risk for malaria held pessimistic perceptions of their risk for the disease, but the reasons for this finding are unclear (Morrison, Ager, & …

The Development And Use Of A Geographic Information System For Evaluating The Association Between Pesticide Exposure And Prostate Cancer, Kristen Wells

Theses and Dissertations

Abstract 1 – A Geographic Information System for Evaluating Residential Pesticide Exposure and Prostate Cancer Incidence Agricultural pesticide exposure is hypothesized to be a risk factor for prostate cancer, and such exposures are of particular concern for men living in farming communities where large-scale pesticide applications occur. Prostate cancer incidence data were obtained from the State Health Registry of Iowa for the years 1996 through 2006, and county and census tract level age-adjusted incidence rates were calculated. Historical crop-specific land use records and pesticide sales data for the state of Iowa during 1990 were integrated into a geographic information system …

Plasma Prekallikrein Levels Are Positively Associated With Circulating Lipid Levels And The Metabolic Syndrome In Children., James A. Mackenzie, Kristen A. Roosa, Brooks B. Gump, Amy K. Dumas, Kestutis G. Bendinskas

Falk College Research Center

Plasma prekallikrein (PK) has been shown to be associated with cardiovascular disease (CVD) and its risk factors, but these associations have not been investigated in children. The present study examined PK activity in relation to well-established cardiovascular risk factors in a cohort of children aged 9–11 years (N = 97). We found a significant and positive association between PK and fasting levels of total cholesterol (p < 0.01), non-high-density lipoprotein cholesterol (p < 0.01), and triglycerides (p < 0.001). In addition, there was a significant association between PK activity and the metabolic syndrome, a clustering of risk factors considered to have an impact on atherosclerosis and CVD mortality. Finally, we found that children with a family history of CVD had significantly elevated PK activity. These novel findings warrant further investigations into the relationship between circulating PK levels and CVD risk factors because PK may be involved in the progression of the disease state. Il est bien connu que la pre´kallicre´ine (PK) est associe´e a` la maladie cardiovasculaire (CVD) et a` ses facteurs de risque, mais ces associations n’ont pas e´te´ ve´rifie´es chez les enfants. Cette e´tude se propose de ve´rifier l’association entre l’activite´ de la PK et les facteurs de risque de CVD aupre`s d’une cohorte d’enfants aˆge´s de 9 a` 11 ans (N = 97). On observe une corre´lation positive significative entre la PK et les variables suivantes : la concentration totale de choleste´rol a` jeun (p < 0,01), les concentrations des lipoprote´ines non a` haute densite´ (p < 0,01) et la concentration des triglyce´rides (p < 0,001). De plus, on observe une corre´lation significative entre l’activite´ de la PK et le syndrome me´tabolique constitue par un ensemble de facteurs ayant un effet sur l’athe´roscle´rose et la mortalite´ due a` la CVD. En dernier lieu, les enfants avec des ante´ce´dents familiaux de CVD pre´sentent une plus importante activite´ de la PK, et ce, de fac¸on significative. Ces premie`res observations sugge`rent d’autres e´tudes sur la relation entre la concentration sanguine de PK et les facteurs de risque de CVD, car la PK pourrait eˆtre implique´e dans la progression de la maladi

Aids Epidemic In The Russian Federation And Policy Reform, Veronika Kiselev

Independent Study Project (ISP) Collection

The AIDS epidemic in the Russian Federation has been a constant struggle for the government and the population since the early 90’s. The epidemic is the most rapidly growing epidemic of HIV/AIDS seen in history and has caused much international attention. The epidemic coinciding with the fall of the Soviet Union and the transition of the Russian government from socialist to democratic state has had a huge impact on the policy and government actions to fight the epidemic. The financial struggles that hit a large portion of the population as a result of the fall of the Soviet Union caused …

Gender, Germs, And Dirt: A Case Study Of Properly Politicised Science, Sharyn Clough

XIV IAPh Symposium 2010

This presentation is part of the Feminist Perspectives in the Sciences: Epidemiology track.

The relatively recent increase in cases of allergies and asthma, especially in industrialised nations of the north and west, has been explained by the “hygiene hypothesis”—viz., that increased cleanliness and sanitation have unintended negative consequences for immune health—an hypothesis that has received robust epidemiological support (e.g., Platts-Mills 2002). Over the last few years, support for the hypothesis has increased with the discovery that populations regularly exposed to certain parasitic worms (helminths) have very low incidence of chronic inflammatory diseases such as Crohn’s (Elliot, Summers, and Weinstock 2007). …

Association Between Obesity, Depression, And Inflammation Among Seventh-Day Adventists In The Biopsychosocial Religion And Health Study, Michael Paalani

Loma Linda University Electronic Theses, Dissertations & Projects

The effects of obesity and depression on morbidity and mortality may be mediated by inflammatory processes. Homeostasis within the immune system depends on a balance of pro-inflammatory and anti-inflammatory cytokine molecules, so chronic inflammatory diseases may result from cytokine dysregulation. The target population consisted of 508 Seventh Day Adventists (SDAs) who participated in the Biopsychosocial Religion and Health Study (BHRS), a sub-study of the Adventist Health Study-2. The study was a cross-sectional analysis of the association between obesity, depression, and inflammation after controlling for demographic, socioeconomic, health behavioral, and health status variables among BHRS participants.

Obesity was assessed by body …

The Association Between Teen Parenthood And Marital Status Among Women, Amy Feinberg

Theses and Dissertations

Introduction: Teen pregnancy and teen parenting are prevalent and significant public health issues. Teen parenting also has many social and economic consequences for mother and family. Single parenthood is associated with increased financial, work and child care strains compared to a more traditional family type. Therefore, the impact of teen pregnancy on marital status needs to be investigated. This study examines the association between teen parenthood and future marital status. Methods: The 2002 National Survey of Family Growth, Cycle 6 was analyzed. This study included 12398 women age 20 – 44 years who had children. Teen parenthood was defined as …

A Community-Engaged Research Approach To The Development Of An Assessment Tool For Historical Data Collection Of Saara Client Population, Jessica Markey

Theses and Dissertations

Through collaboration between the Substance Abuse and Addiction Recovery Alliance (SAARA) and several community partners, a need was identified for a new measurement tool to gather comprehensive client histories for program evaluation and development. The purpose of this study was to (1) develop a culturally relevant and organizationally appropriate mechanism for the collection of comprehensive client histories and (2) to provide the opportunity for staff to engage in a new process of developing and implementing data collection strategies. As a result of the use of a community-based participatory approach, (1) a missed opportunity for program evaluation and development was identified, …

A Qualitative Approach To Explore The Experiences Of Health Care Providers Who Treat Patients For Post Traumatic Stress Disorder (Ptsd), Mark Killebrew

Theses and Dissertations

Post Traumatic Stress Disorder (PTSD) is an anxiety disorder that occurs when people are exposed to stressful, life-threatening experiences. Consequently, after exposure to such an event, many people may experience fear, guilt, or anger and may believe the trauma is reoccurring. According to the National Institute of Mental Health, approximately 5.2 million U.S. adults age 18-54 have PTSD in any given year. The prevalence of PTSD is even more problematic within the military where an estimated 30% of those who have spent time in war zones experiences PTSD. Researchers have been examining the impact of veterans’ PTSD symptoms on family …

Statin Use And The Risk Of Clostridium Difficile In Academic Medical Centers: A Matched Case Control Study, Christine Motzkus

Theses and Dissertations

BACKGROUND: Increasing rates of hospital acquired Clostridium difficile (CDI), as well as mortality owing to CDI, warrants further exploration of risk factors. Clostridium difficile bacteria typically produce toxins which inactivate the Rho proteins found in the colonic epithelium. Statins also disrupt Rho protein cell signaling functions. The objective of this study was to estimate the extent to which use of statins increases the risk of healthcare-acquired CDI. METHODS: Patients over 18 years of age admitted to hospitals contributing data to the University HealthSystem Consortium between 2002 and 2009 were eligible. We identified 25, 111 incident cases of CDI and matched …