Biostatistics Commons^™

Risk Factors Of Acute Respiratory Infections In Practice Area For Community Of Medical Students In Semarang, Siti Thomas Zulaikhah, Purwito Soegeng, Titiek Sumarawati

Kesmas

Infeki saluran pernapasan akut (ISPA) menempati urutan pertama dari 10 besar penyakit di Puskesmas Bangetayu dengan persentase terbanyak di Kelurahan Penggaron Lor. Keterampilan untuk mempelajari distribusi dan frekuensi penyakit serta faktor determinan yang memengaruhi manusia sangat diperlukan untuk menetapkan intervensi yang paling efektif untuk meningkatkan derajat kesehatan masyarakat. Perlu dilakukan penelitian untuk mengetahui faktor risiko yang paling dominan berhubungan dengan kejadian ISPA di lokasi praktik komunitas mahasiswa Fakultas Kedokteran Universitas Islam Sultan Agung Semarang. Penelitian ini menggunakan desain potong lintang dengan jumlah responden 100 orang dan sampel dikumpulkan dengan menggunakan stratified random sampling. Sepuluh variabel yang diteliti adalah faktor risiko …

The Use Of “Kakayu Dental Flipbook” In Oral Health Knowledge Improvement For Elementary School Students In Depok, Rikawarastuti Rikawarastuti, Eka Anggreni, Rahaju Budiarti, Nurlaila Ramadhan Suid

Kesmas

Perlu adanya edukasi untuk meningkatkan pengetahuan anak Indonesia tentang pentingnya memelihara kesehatan gigi dan mulut. Penelitian ini bertujuan untuk menjelaskan hubungan antara faktor siswa sekolah dasar seperti kelas, usia, jenis kelamin dengan jumlah anak dalam keluarga atau faktor ekonomi seorang ibu rumah tangga atau berpenghasilan tetap, yang dipengaruhi oleh peningkatan pengetahuan dari edukasi kesehatan gigi dan mulut. Disain penelitian quasi experiment pre-test dan post-test tanpa desain grup kontrol melibatkan 141 siswa yang dipilih melalui purposive sampling. Sampel tersebar pada siswa kelas IV, V, dan VI sekolah dasar swasta di Depok, Jawa Barat, Indonesia pada April-Oktober 2016. Data penelitian diperoleh dari …

Extrovert Personality Type And Prolonged Second Stage Of Labor, Yuni Kusmiyati, Chandra Tyas Nurfitria, Suherni Suherni, Heni Puji Wahyuningsih

Kesmas

Kepribadian dapat memengaruhi respons individu yang dapat berdampak pada proses persalinan lama. Penelitian sebelumnya menunjukkan adanya hubungan kepribadian dengan waktu persalinan. Tipe kepribadian ekstrover (tipe A) cenderung lebih rentan terhadap stres dibandingkan orang dengan tipe kepribadian introvert (tipe B). Penelitian ini bertujuan untuk mengetahui hubungan tipe kepribadian ekstrover dan variabel luar (pendidikan, ekonomi, usia ibu dan paritas) dengan persalinan kala II lama. Studi kasus kontrol dilakukan pada 156 ibu bersalin yang memenuhi kriteria inklusi pada tahun 2015 di Yogyakarta. Sampel kasus adalah 52 ibu dengan persalinan kala II lama dan kontrol adalah 104 ibu dengan persalinan kala II normal. Penelitian …

Effects Of Multilevel Intervention In Workplace Health Promotion On Workers’ Metabolic Syndrome Components, Zahtamal Zahtamal, Wasilah Rochmah, Yayi Suryo Prabandari

Kesmas

Sekitar 10-30% orang Asia dewasa mengalami sindrom metabolik. Penelitian ini bertujuan untuk mengungkap efek Promosi Kesehatan di Tempat Kerja PKDTK dengan intervensi multilevel pada komponen/penanda pekerja yang menderita sindrom metabolik. Penelitian ini dilakukan pada tahun 2014-2015 dengan menggunakan desain quasi experimental dengan intervensi subjek secara multilevel di Indonesia. Program PKDTK untuk kelompok intervensi multilevel berupa kombinasi latihan fisik, diet, pendidikan kesehatan, dukungan sosial, dan advokasi salama 12 minggu. Program PKDTK untuk kelompok kontrol hanya pendidikan kesehatan. Instrumen penelitian seperti IPAQ, table food recall 24 jam, alat pengukuran fisik, dan laboratorium klinis. Analisis data menggunakan Marginal Homogeneity, paired sample t, Mc …

Midlife And Late-Life Vascular Risk Factors And White Matter Microstructural Integrity: The Atherosclerosis Risk In Communities Neurocognitive Study., Melinda C Power, Jonathan V Tingle, Robert I Reid, Juebin Huang, A Richey Sharrett, Josef Coresh, Michael Griswold, Kejal Kantarci, Clifford R Jack, David Knopman, Rebecca F Gottesman, Thomas H Mosley

Epidemiology Faculty Publications

BACKGROUND: Diffusion tensor imaging measures of white matter (WM) microstructural integrity appear to provide earlier indication of WM injury than WM hyperintensities; however, risk factors for poor WM microstructural integrity have not been established. Our study quantifies the association between vascular risk factors in midlife and late life with measures of late-life WM microstructural integrity.

METHODS AND RESULTS: We used data from 1851 participants in ARIC (Atherosclerosis Risk in Communities Study) who completed 3-T magnetic resonance imaging, including diffusion tensor imaging, as part of the ARIC Neurocognitive Study (ARIC-NCS). We quantified the association among lipids, glucose, and blood pressure from …

Cohort Profile: Seek, Test, Treat And Retain United States Criminal Justice Cohort., Redonna Chandler, Michael S Gordon, Bridget Kruszka, Lauren N Strand, Frederick L Altice, Irene Kuo, +Several Additional Authors

Epidemiology Faculty Publications

BACKGROUND: The STTR treatment cascade provides a framework for research aimed at improving the delivery of services, care and outcomes of PLWH. The development of effective approaches to increase HIV diagnoses and engage PLWH in subsequent steps of the treatment cascade could lead to earlier and sustained ART treatment resulting in viral suppression. There is an unmet need for research applying the treatment cascade to improve outcomes for those with criminal justice involvement.

METHODS: The Seek, Test, Treat, and Retain (STTR) criminal justice (CJ) cohort combines data from 11 studies across the HIV treatment cascade that focused on persons involved …

Cancer-Specific Mortality, Cure Fraction, And Noncancer Causes Of Death Among Diffuse Large B-Cell Lymphoma Patients In The Immunochemotherapy Era., Nadia Howlader, Angela B Mariotto, Caroline Besson, Gita Suneja, Kim Robien, Naji Younes, Eric A Engels

Epidemiology Faculty Publications

BACKGROUND

Survival after the diagnosis of diffuse large B-cell lymphoma (DLBCL) has been increasing since 2002 because of improved therapies; however, long-term outcomes for these patients in the modern treatment era are still unknown.

METHODS

Using Surveillance, Epidemiology, and End Results data, this study first assessed factors associated with DLBCL-specific mortality during 2002-2012. An epidemiologic risk profile, based on clinical and demographic characteristics, was used to stratify DLBCL cases into low-, medium-, and high-risk groups. The proportions of DLBCL cases that might be considered cured in these 3 risk groups was estimated. Risks of death due to various noncancer causes …

Tuberculosis And Risk Of Acute Myocardial Infarction: A Propensity Score-Matched Analysis, Moises A. Huaman, Richard J. Kryscio, Carl J. Fichtenbaum, David Henson, Elizabeth G. Salt, Timothy R. Sterling, Beth A. Garvy

Biostatistics Faculty Publications

Several pathogens have been associated with increased cardiovascular disease (CVD) risk. Whether this occurs with Mycobacterium tuberculosis infection is unclear. We assessed if tuberculosis disease increased the risk of acute myocardial infarction (AMI). We identified patients with tuberculosis index claims from a large de-identified database of ~15 million adults enrolled in a U.S. commercial insurance policy between 2008 and 2010. Tuberculosis patients were 1:1 matched to patients without tuberculosis claims using propensity scores. We compared the occurrence of index AMI claims between the tuberculosis and non-tuberculosis cohorts using Kaplan–Meier curves and Cox Proportional Hazard models. Data on 2026 patients with …

Demographics, Patterns Of Care, And Survival In Pediatric Medulloblastoma, Emily V. Dressler, Therese A. Dolecek, Meng Liu, John L. Villano

Internal Medicine Faculty Publications

We evaluated the American College of Surgeon’s National Cancer Data Base (NCDB) to describe current hospital-based epidemiologic frequency, survival, and patterns of care of pediatric medulloblastoma. We analyzed NCDB 1998–2011 data on medulloblastoma for children ages 0–19 years using logistic and poisson regression, Kaplan–Meier survival estimates, and Cox proportional hazards models. 3647 cases of medulloblastoma in those aged 0–19 years were identified. Chemotherapy was received by 79 and 74% received radiation, with 65% receiving both therapies. Those who received radiation were more likely to be older than four, while those who received chemotherapy were more likely to be age four …

A Comparison Of Statistical Methods Relating Pairwise Distance To A Binary Subject-Level Covariate, Rachael Stone

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

A community ecologist provided a motivating data set involving a certain animal species with two behavior groups, along with a pairwise genetic distance matrix among individuals. Many community ecologists have analyzed similar data sets with a method known as the Hopkins method, testing for an association between the subject-level covariate (behavior group) and the pairwise distance. This community ecologist wanted to know if they used the Hopkins method, would their results be meaningful? Their question inspired this thesis work, where a different data set was used for confidentiality reasons. Multiple methods (Hopkins method, ADONIS, ANOSIM, and Distance Regression) were used …

Statistical Methods For Two Problems In Cancer Research: Analysis Of Rna-Seq Data From Archival Samples And Characterization Of Onset Of Multiple Primary Cancers, Jialu Li

Dissertations and Theses (Open Access)

My dissertation is focused on quantitative methodology development and application for two important topics in translational and clinical cancer research.

The first topic was motivated by the challenge of applying transcriptome sequencing (RNA-seq) to formalin-fixation and paraffin-embedding (FFPE) tumor samples for reliable diagnostic development. We designed a biospecimen study to directly compare gene expression results from different protocols to prepare libraries for RNA-seq from human breast cancer tissues, with randomization to fresh-frozen (FF) or FFPE conditions. To comprehensively evaluate the FFPE RNA-seq data quality for expression profiling, we developed multiple computational methods for assessment, such as the uniformity and continuity …

Does Educational Level Influence Postmenopausal Breast Cancer Mortality Among Asians In U.S.?, Sfurti Maheshwari

UNLV Theses, Dissertations, Professional Papers, and Capstones

Studies on mortality from postmenopausal breast cancer (PMBC) by education level have not shown consistent results among US women. For US Asians, often seen as a “model” minority in terms of affluence and education this relationship has never been studied despite PMBC being the most common cancer in the country.

We analyzed 2008-2012 California Vital Statistics data and population data from the American Community Survey 2012 to compute age and education adjusted mortality ratios using negative binomial regression model for White (as a reference category) and Asian women. In total 3,277,106 (80%) White women and 852,376 (20%) Asian women died …

Comparison Of Survival Curves Between Cox Proportional Hazards, Random Forests, And Conditional Inference Forests In Survival Analysis, Brandon Weathers

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Survival analysis methods are a mainstay of the biomedical fields but are finding increasing use in other disciplines including finance and engineering. A widely used tool in survival analysis is the Cox proportional hazards regression model. For this model, all the predicted survivor curves have the same basic shape, which may not be a good approximation to reality. In contrast the Random Survival Forests does not make the proportional hazards assumption and has the flexibility to model survivor curves that are of quite different shapes for different groups of subjects. We applied both techniques to a number of publicly available …

Functional Human Grin2b Promoter Polymorphism And Variation Of Mental Processing Speed In Older Adults, Yang Jiang, Ming Kuan Lin, Gregory A. Jicha, Xiuhua Ding, Sabrina L. Mcilwrath, David W. Fardo, Lucas S. Broster, Frederick A. Schmitt, Richard J. Kryscio, Robert H. Lipsky

Behavioral Science Faculty Publications

We investigated the role of a single nucleotide polymorphism rs3764030 (G > A) within the human GRIN2B promoter in mental processing speed in healthy, cognitively intact, older adults. In vitro DNA-binding and reporter gene assays of different allele combinations in transfected cells showed that the A allele was a gain-of-function variant associated with increasing GRIN2B mRNA levels. We tested the hypothesis that individuals with A allele will have better memory performance (i.e. faster reaction times) in older age. Twenty-eight older adults (ages 65-86) from a well-characterized longitudinal cohort were recruited and performed a modified delayed match-to-sample task. The rs3764030 polymorphism was …

Estimating Autoantibody Signatures To Detect Autoimmune Disease Patient Subsets, Zhenke Wu, Livia Casciola-Rosen, Ami A. Shah, Antony Rosen, Scott L. Zeger

Johns Hopkins University, Dept. of Biostatistics Working Papers

Autoimmune diseases are characterized by highly specific immune responses against molecules in self-tissues. Different autoimmune diseases are characterized by distinct immune responses, making autoantibodies useful for diagnosis and prediction. In many diseases, the targets of autoantibodies are incompletely defined. Although the technologies for autoantibody discovery have advanced dramatically over the past decade, each of these techniques generates hundreds of possibilities, which are onerous and expensive to validate. We set out to establish a method to greatly simplify autoantibody discovery, using a pre-filtering step to define subgroups with similar specificities based on migration of labeled, immunoprecipitated proteins on sodium dodecyl sulfate …

Network Exploration Of Correlated Multivariate Protein Data For Alzheimer's Disease Association, Matthew J. Lane

Theses

Alzheimer Disease (AD) is difficult to diagnose by using genetic testing or other traditional methods. Unlike diseases with simple genetic risk components, there exists no single marker determining as to whether someone will develop AD. Furthermore, AD is highly heterogeneous and different subgroups of individuals develop the disease due to differing factors. Traditional diagnostic methods using perceivable cognitive deficiencies are often too little too late due to the brain having suffered damage from decades of disease progression. In order to observe AD at early stages prior to the observation of cognitive deficiencies, biomarkers with greater accuracy are required. By using …

Positive Affect Predicts Cerebral Glucose Metabolism In Late Middle-Aged Adults., Christopher Nicholas, Siobhan M Hoscheidt, Lindsay R Clark, Annie M Racine, Sara E Berman, Rebecca L Koscik, N Maritza Dowling, Sanjay Asthana, Bradley T Christian, Mark A Sager, Sterling C Johnson

GW Biostatistics Center

Positive affect is associated with a number of health benefits; however, few studies have examined the relationship between positive affect and cerebral glucose metabolism, a key energy source for neuronal function and a possible index of brain health. We sought to determine if positive affect was associated with cerebral glucose metabolism in late middle-aged adults (n = 133). Participants completed the positive affect subscale of the Center for Epidemiological Studies Depression Scale at two time points over a two-year period and underwent 18F-fluorodeoxyglucose-positron emission tomography scanning. After controlling for age, sex, perceived health status, depressive symptoms, anti-depressant use, family …

Identification Of Prognostic Genes And Gene Sets For Early-Stage Non-Small Cell Lung Cancer Using Bi-Level Selection Methods, Suyan Tian, Chi Wang, Howard H. Chang, Jianguo Sun

Biostatistics Faculty Publications

In contrast to feature selection and gene set analysis, bi-level selection is a process of selecting not only important gene sets but also important genes within those gene sets. Depending on the order of selections, a bi-level selection method can be classified into three categories – forward selection, which first selects relevant gene sets followed by the selection of relevant individual genes; backward selection which takes the reversed order; and simultaneous selection, which performs the two tasks simultaneously usually with the aids of a penalized regression model. To test the existence of subtype-specific prognostic genes for non-small cell lung cancer …

Level Of Patient-Physician Agreement In Assessment Of Change Following Conservative Rehabilitation For Shoulder Pain, Stephanie D. Moore-Reed, W. Ben Kibler, Heather M. Bush, Timothy L. Uhl

Biostatistics Faculty Publications

Background Assessment of health-related status has been shown to vary between patients and physicians, although the degree of patient–physician discordance in the assessment of the change in status is unknown.

Methods Ninety-nine patients with shoulder dysfunction underwent a standardized physician examination and completed several self-reported questionnaires. All patients were prescribed the same physical therapy intervention. Six weeks later, the patients returned to the physician, when self-report questionnaires were re-assessed and the Global Rating of Change (GROC) was completed by the patient. The physician completed the GROC retrospectively. To determine agreement between patient and physician, intra-class correlation (ICC) coefficient and Pearson’s …

Examining The Prevalence Rates Of Preexisting Maternal Medical Conditions And Pregnancy Complications By Source: Evidence To Inform Maternal And Child Research, Candace A. Robledo, Edwina H. Yeung, Pauline Mendola, Rajeshwari Sundaram, Nansi S. Boghossian, Erin M. Bell, Charlotte Druschel

School of Medicine Publications

Objectives—We sought to examine whether there are systematic differences in ascertainment of preexisting maternal medical conditions and pregnancy complications from three common data sources used in epidemiologic research

Methods—Diabetes mellitus, chronic hypertension, gestational diabetes mellitus (GDM), gestational hypertensive disorders (GHD), placental abruption and premature rupture of membranes (PROM) among 4821 pregnancies were identified via birth certificates, maternal self-report at approximately 4 months postpartum and by discharge codes from the Statewide Planning and Research Cooperative System (SPARCS), a mandatory New York State hospital reporting system. The kappa statistic (k) was estimated to ascertain beyond chance agreement of outcomes between birth certificates …