Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Medicine and Health Sciences (83)
- Public Health (76)
- Epidemiology (66)
- Life Sciences (42)
- Social and Behavioral Sciences (31)
-
- Environmental Public Health (30)
- Occupational Health and Industrial Hygiene (30)
- Health Policy (29)
- Health Services Research (29)
- Nutrition (29)
- Public Affairs, Public Policy and Public Administration (29)
- Public Health Education and Promotion (29)
- Women's Health (29)
- Statistical Methodology (9)
- Community Health (6)
- Genetics and Genomics (6)
- Mental and Social Health (6)
- Genetics (5)
- Medical Specialties (5)
- Statistical Theory (5)
- Bioinformatics (4)
- Longitudinal Data Analysis and Time Series (4)
- Statistical Models (4)
- Applied Statistics (3)
- Diseases (3)
- Medical Sciences (3)
- Survival Analysis (3)
- Institution
-
- COBRA (55)
- Universitas Indonesia (29)
- Himmelfarb Health Sciences Library, The George Washington University (26)
- University of Kentucky (14)
- Georgia Southern University (6)
-
- Virginia Commonwealth University (6)
- East Tennessee State University (4)
- Old Dominion University (3)
- University at Albany, State University of New York (3)
- University of Louisville (3)
- University of South Carolina (3)
- The Texas Medical Center Library (2)
- Yale University (2)
- Dartmouth College (1)
- Missouri University of Science and Technology (1)
- University of Connecticut (1)
- University of Massachusetts Boston (1)
- University of Nebraska - Lincoln (1)
- University of Nebraska Medical Center (1)
- University of Nevada, Las Vegas (1)
- University of South Florida (1)
- Western University (1)
- Keyword
-
- Humans (8)
- Cross-validation (5)
- Female (5)
- Adult (4)
- Causal inference (4)
-
- Heterogeneity (4)
- Interaction (4)
- Male (4)
- Optimal dynamic treatment (4)
- Adolescent (3)
- Asymptotic linearity (3)
- Balita (3)
- Biostatistics and Epidemiology (3)
- Dynamic treatment (3)
- Efficient estimator (3)
- Health Knowledge, Attitudes, Practice (3)
- Inverse probability weighting (3)
- Longitudinal data (3)
- Malaria (3)
- Middle Aged (3)
- NHANES (3)
- Pathwise differentiable parameter (3)
- Q-learning (3)
- Super-learning (3)
- Targeted minimum loss-based estimation (3)
- Adherence (2)
- Aged (2)
- Air susu ibu (2)
- Aktivitas fisik (2)
- Big data (2)
- Publication
-
- Kesmas (29)
- Harvard University Biostatistics Working Paper Series (19)
- Epidemiology Faculty Publications (13)
- GW Biostatistics Center (13)
- Biostatistics Faculty Publications (11)
-
- U.C. Berkeley Division of Biostatistics Working Paper Series (11)
- Johns Hopkins University, Dept. of Biostatistics Working Papers (10)
- Theses and Dissertations (8)
- Biostatistics: Faculty Publications (6)
- UW Biostatistics Working Paper Series (5)
- COBRA Preprint Series (4)
- Electronic Theses and Dissertations (4)
- The University of Michigan Department of Biostatistics Working Paper Series (4)
- ETSU Faculty Works (3)
- Legacy Theses & Dissertations (2009 - 2024) (3)
- Mathematics & Statistics Faculty Publications (3)
- Dissertations and Theses (Open Access) (2)
- Yale Day of Data (2)
- Brigitte Tenhumberg Papers (1)
- CHIP Documents (1)
- Dartmouth Scholarship (1)
- Epidemiology and Biostatistics Publications (1)
- Faculty Publications (1)
- Journal Articles: Biostatistics (1)
- Masters Theses (1)
- Memorial Sloan-Kettering Cancer Center, Dept. of Epidemiology & Biostatistics Working Paper Series (1)
- Pathology and Laboratory Medicine Faculty Publications (1)
- Statistics Faculty Publications (1)
- Theses and Dissertations--Statistics (1)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (1)
- Publication Type
Articles 151 - 165 of 165
Full-Text Articles in Biostatistics
Statistical Modeling Of The Number Of Deaths Of Children In Bangladesh, Morshed Alam, Manzur R. Farazi, Joseph Stiglitz, Munni Begum
Statistical Modeling Of The Number Of Deaths Of Children In Bangladesh, Morshed Alam, Manzur R. Farazi, Joseph Stiglitz, Munni Begum
Journal Articles: Biostatistics
Efforts to reduce the number of children’s death in developing countries through health care programs focus more to the prevention and control of diseases than to determining the underlying risk factors/predictors and addressing these through proper interventions. This study aims to identify socioeconomic and demographic predictors of the number of children’s death to women aged 12-49 from the Bangladesh Health and Demographic Survey (BDHS) administered in 2011. The number of children’s death in a family is a non-negative count response variable. The average number of children’s death is found to be 28 per 100 women with a variance of 44per …
Incorporating Dependence Boundaries In Simulating Associated Discrete Data, Mary E. Haynes
Incorporating Dependence Boundaries In Simulating Associated Discrete Data, Mary E. Haynes
Theses and Dissertations
In the study of associated discrete variables, limitations on the range of the possible association measures (Pearson correlation, odds ratio, etc.) arise from the form of the joint probability function between the variables. These limitations are known as the Fréchet bounds. The bounds for cases involving associated binary variables are explored in the context of simulating datasets with a desired correlation and set of marginal probabilities. A new method for creating such datasets is compared to an existing method that uses the multivariate probit. A method for simulating associated binary variables using a desired odds ratio and known marginal probabilities …
Roughened Random Forests For Binary Classification, Kuangnan Xiong
Roughened Random Forests For Binary Classification, Kuangnan Xiong
Legacy Theses & Dissertations (2009 - 2024)
Binary classification plays an important role in many decision-making processes. Random forests can build a strong ensemble classifier by combining weaker classification trees that are de-correlated. The strength and correlation among individual classification trees are the key factors that contribute to the ensemble performance of random forests. We propose roughened random forests, a new set of tools which show further improvement over random forests in binary classification. Roughened random forests modify the original dataset for each classification tree and further reduce the correlation among individual classification trees. This data modification process is composed of artificially imposing missing data that are …
Raman Spectroscopy Of Blood Serum And Cerebrospinal Fluid And Multivariate Data Analysis For Alzheimer's Disease Diagnostics, Elena Ryzhikova
Raman Spectroscopy Of Blood Serum And Cerebrospinal Fluid And Multivariate Data Analysis For Alzheimer's Disease Diagnostics, Elena Ryzhikova
Legacy Theses & Dissertations (2009 - 2024)
The efficient and accurate diagnosis at the early stages of dementia is a key moment for effective treatment and productive research to find a new ways to combat the disease. It is especially true for Alzheimer's disease (AD) for which there is no effective cure, but several treatments are known to allow slowing down the degenerative processes. Alzheimer's disease (AD) displays only non-specific clinical symptoms of mental decline for decades after the initiation and is very challenging to differentiate even at the later stages when it becomes very aggressive. Despite the great need, current diagnostic tests are unable to diagnose …
New Matching Algorithm-- : Outlier First Matching (Ofm) And Its Performance On Propensity Score Analysis (Psa) Under New Stepwise Matching Framework (Smf), Yi Sun
Legacy Theses & Dissertations (2009 - 2024)
An observational study is an empirical investigation of treatment effect when randomized experimentation is not ethical or feasible (Rosenbaum 2009). Observational studies are common in real life due to the following reasons: a) randomization is not feasible due to the ethical or financial reason; b) data are collected from survey or other resources where the object and design of the study has not been determined (e.g. retrospective study using administrative records); c) little knowledge on the given region so that some preliminary studies of observational data are conducted to formulate hypotheses to be tested in subsequent experiments. When statistical analysis …
Genetic Association Testing Of Copy Number Variation, Yinglei Li
Genetic Association Testing Of Copy Number Variation, Yinglei Li
Theses and Dissertations--Statistics
Copy-number variation (CNV) has been implicated in many complex diseases. It is of great interest to detect and locate such regions through genetic association testings. However, the association testings are complicated by the fact that CNVs usually span multiple markers and thus such markers are correlated to each other. To overcome the difficulty, it is desirable to pool information across the markers. In this thesis, we propose a kernel-based method for aggregation of marker-level tests, in which first we obtain a bunch of p-values through association tests for every marker and then the association test involving CNV is based on …
Statistical Analysis Of Sleep Patterns In Drosophila Melanogaster, Luyang Wang
Statistical Analysis Of Sleep Patterns In Drosophila Melanogaster, Luyang Wang
Masters Theses
“Sleep is one of the most preserved and restorative behaviors of animals and is important in human health. Lack of sleep may cause numerous diseases. So the study of sleep rhythms is very essential and complicated. In order to simplify the process of studying sleep, the fruit fly Drosophila melanogaster, is utilized as a model organism for several reasons. Some of the molecular mechanisms that contribute to the circadian clock in the fruit fly were also found to generate similar cycles in mammals. In order to study sleep patterns in the fruit fly, experiments were designed and performed to …
Testing Longitudinal Data By Logarithmic Quantiles, Manfred Denker, Lucia Tabacu
Testing Longitudinal Data By Logarithmic Quantiles, Manfred Denker, Lucia Tabacu
Mathematics & Statistics Faculty Publications
The shoulder tip pain study of Lumley [13] is re-investigated. It is shown that the new logarithmic quantile estimation (LQE) technique in [9] applies and behaves well under singular covariance structure and small sample sizes as in the shoulder tip pain study. The findings in [6] can be assured under weaker assumptions using a combination of LQE and an ANOVA type statistic. © 2014, Institute of Mathematical Statistics.
Mate Choice And The Evolutionary Stability Of A Fixed Threshold In A Sequential Search Strategy, Raymond Cheng, Steven M. Seubert, Daniel D. Wiegmann
Mate Choice And The Evolutionary Stability Of A Fixed Threshold In A Sequential Search Strategy, Raymond Cheng, Steven M. Seubert, Daniel D. Wiegmann
Mathematics & Statistics Faculty Publications
The sequential search strategy is a prominent model of searcher behavior, derived as a rule by which females might sample and choose a mate from a distribution of prospective partners. The strategy involves a threshold criterion against which prospective mates are evaluated. The optimal threshold depends on the attributes of prospective mates, which are likely to vary across generations or within the lifetime of searchers due to stochastic environmental events. The extent of this variability and the cost to acquire information on the distribution of the quality of prospective mates determine whether a learned or environmentally canalized threshold is likely …
Causality Is Logically Definable-Toward An Equilibrium-Based Computing Paradigm Of Quantum Agents And Quantum Intelligence (Qaqi), Wen-Ran Zhang, Karl E. Peace
Causality Is Logically Definable-Toward An Equilibrium-Based Computing Paradigm Of Quantum Agents And Quantum Intelligence (Qaqi), Wen-Ran Zhang, Karl E. Peace
Biostatistics: Faculty Publications
A survey on agents, causality and intelligence is presented and an equilibrium-based computing paradigm of quantum agents and quantum intelligence (QAQI) is proposed. In the survey, Aristotle’s causality principle and its historical extensions by David Hume, Bertrand Russell, Lotfi Zadeh, Donald Rubin, Judea Pearl, Niels Bohr, Albert Einstein, David Bohm, and the causal set initiative are reviewed; bipolar dynamic logic (BDL) is introduced as a causal logic for bipolar inductive and deductive reasoning; bipolar quantum linear algebra (BQLA) is introduced as a causal algebra for quantum agent interaction and formation. Despite the widely held view that causality is undefinable with …
Native Insect Herbivory Limits Population Growth Rate Of A Non-Native Thistle, James O. Eckberg, Brigitte Tenhumberg, Svata M. Louda
Native Insect Herbivory Limits Population Growth Rate Of A Non-Native Thistle, James O. Eckberg, Brigitte Tenhumberg, Svata M. Louda
Brigitte Tenhumberg Papers
The influence of native fauna on non-native plant population growth, size, and distribution is not well documented. Previous studies have shown that native insects associated with tall thistle (Cirsium altissimum) also feed on the leaves, stems, and flower heads of the Eurasian congener Cirsium vulgare, thus limiting individual plant performance. In this study, we tested the effects of insect herbivores on the population growth rate of C. vulgare. We experimentally initiated invasions by adding seeds at four unoccupied grassland sites in eastern Nebraska, USA, and recorded plant establishment, survival, and reproduction. Cumulative foliage and floral herbivory …
The Bivariate Erlang And Its Application In Modeling Recurrence Times Of Kidney Dialysis Data, Norou Diawara, S.H. Sathish Indika, Melva Grant, Edgard M. Maboudou-Tchao
The Bivariate Erlang And Its Application In Modeling Recurrence Times Of Kidney Dialysis Data, Norou Diawara, S.H. Sathish Indika, Melva Grant, Edgard M. Maboudou-Tchao
Mathematics & Statistics Faculty Publications
Recent advances in computer modeling allows us to find closer fits to data. Our emphasis is on the interdependence between occurrence at kidney dialysis. The interdependence between kidney dialysis occurrences is modelled by a bivariate exponential that we propose in this article. The application is shown on the McGilchrist and Aisbett kidney data set with the use of the exponential distribution. The proposed bivariate exponential model has exponential marginal densities, correlated via a latent random variables and with finite probability of simultaneous occurrence. Extension of the model to a bivariate Erlang type distribution with same shape parameter is presented.
Methods For Integrative Analysis Of Genomic Data, Paul Manser
Methods For Integrative Analysis Of Genomic Data, Paul Manser
Theses and Dissertations
In recent years, the development of new genomic technologies has allowed for the investigation of many regulatory epigenetic marks besides expression levels, on a genome-wide scale. As the price for these technologies continues to decrease, study sizes will not only increase, but several different assays are beginning to be used for the same samples. It is therefore desirable to develop statistical methods to integrate multiple data types that can handle the increased computational burden of incorporating large data sets. Furthermore, it is important to develop sound quality control and normalization methods as technical errors can compound when integrating multiple genomic …
Latent Variable Models Given Incompletely Observed Surrogate Outcomes And Covariates, Chunfeng Ren
Latent Variable Models Given Incompletely Observed Surrogate Outcomes And Covariates, Chunfeng Ren
Theses and Dissertations
Latent variable models (LVMs) are commonly used in the scenario where the outcome of the main interest is an unobservable measure, associated with multiple observed surrogate outcomes, and affected by potential risk factors. This thesis develops an approach of efficient handling missing surrogate outcomes and covariates in two- and three-level latent variable models. However, corresponding statistical methodologies and computational software are lacking efficiently analyzing the LVMs given surrogate outcomes and covariates subject to missingness in the LVMs. We analyze the two-level LVMs for longitudinal data from the National Growth of Health Study where surrogate outcomes and covariates are subject to …
The Total Picture: Multiple Chemical Exposures To Pregnant Women In The Us – An Nhanes Study Of Data From 2003 Through 2010, Teri Cabana
Theses and Dissertations
INTRODUCTION: Chemical exposures to US pregnant women have been shown to have adverse health impacts on both mother and fetus. A prior paper revealed that US pregnant women in 2003-2004 had widespread exposure to multiple chemicals. The goal of this research is to examine how environmental chemical exposures to US pregnant women have changed from 2003 to 2010 and to look further at the extent of simultaneous exposure to multiple chemicals in US pregnant women using biomonitoring data available through NHANES (the National Health and Nutritional Examination Survey). METHODS: Using available NHANES data from the following cycles (2003-2004, 2005-2006, 2007-2008, …