SelectedWorks - Hani M. Samawi

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Selected Works of Hani M. Samawi

Professor and Interim chair, Department of Biostatistics, Epidemiology, and Environmental Health Sciences, Jiann-Ping Hsu College of Public Health

Biography, Disciplines and Teaching Interests
Dr. Hani Samawi is a tenured Full Professor in Biostatistics and Interim Chair of the BEES department in Jiann-Ping Hsu college of Public Health College at Georgia Southern university. Dr. Samawi received both MSc and Ph.D. from the University of Iowa, USA.

Dr. Samawi brings about 28 years of experience teaching statistics and biostatistics undergraduate and graduate courses, research in several biostatistical areas, statistical consultation and academic administrator (Department chair at Yarmouk University and Director of the Karl E. Peace Center for Biostatistics from August 2008 to June 2016 at Georgia Southern University). In addition he became a fellow of the Institute for Interdisciplinary STEM Education, invited editor for the special issue for International Journal of Environmental Research and Public Health and Associate Editor of Frontiers in Child Health and Human Development. Since July, 2019, he became the interim chair of the department of Biostatistics, Epidemiology and Environment Health sciences (BEES). Recently, he has been elected as Section Councilor in the Applied Public Health Statistics Section in APHA for three years.

Dr. Samawi research areas are Sampling survey, Bootstrap and Resampling Methods, Parametric and Nonparametric Inference for complete and missing data, Monte Carlo Methods, MCMC Methods, Secondary Data Analysis, Inference for Randomized Clinical Trials, inference under progressive censored data, Meditation Analysis for different types of modeling, latent class Models, medical diagnostics measure and inference and linear and generalized linear models with misclassification.

Disciplines: Biostatistics
Teaching Interests: Statistical Inference and Applied Statistics

Works
About

About Hani M. Samawi

Biography, Disciplines and Teaching Interests
Dr. Hani Samawi is a tenured Full Professor in Biostatistics and Interim Chair of the BEES department in Jiann-Ping Hsu college of Public Health College at Georgia Southern university. Dr. Samawi received both MSc and Ph.D. from the University of Iowa, USA.

Dr. Samawi brings about 28 years of experience teaching statistics and biostatistics undergraduate and graduate courses, research in several biostatistical areas, statistical consultation and academic administrator (Department chair at Yarmouk University and Director of the Karl E. Peace Center for Biostatistics from August 2008 to June 2016 at Georgia Southern University). In addition he became a fellow of the Institute for Interdisciplinary STEM Education, invited editor for the special issue for International Journal of Environmental Research and Public Health and Associate Editor of Frontiers in Child Health and Human Development. Since July, 2019, he became the interim chair of the department of Biostatistics, Epidemiology and Environment Health sciences (BEES). Recently, he has been elected as Section Councilor in the Applied Public Health Statistics Section in APHA for three years.

Dr. Samawi research areas are Sampling survey, Bootstrap and Resampling Methods, Parametric and Nonparametric Inference for complete and missing data, Monte Carlo Methods, MCMC Methods, Secondary Data Analysis, Inference for Randomized Clinical Trials, inference under progressive censored data, Meditation Analysis for different types of modeling, latent class Models, medical diagnostics measure and inference and linear and generalized linear models with misclassification.

Disciplines: Biostatistics
Teaching Interests: Statistical Inference and Applied Statistics

Refereed Journal Articles (135)

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A Nationwide Study of the “July Effect” Concerning Postpartum Hemorrhage and Its Risk Factors at Teaching Hospitals across the United States (Zahra Shahin, Gulzar H. Shah, Bettye Apenteng, et al.) Healthcare (2023)

Objective To assess the “July effect” and the risk of postpartum hemorrhage (PPH) and its risk factors across the U.S. teaching hospitals. Method This study used the 2018 Nationwide Inpatient Sample (NIS) and included 2,056,359 ...

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Net Benefit of Diagnostic Tests for Multistate Diseases: an Indicator Variables Approach (Hani Samawi, Ferdous Ahmeda, Gene Pennello, et al.) Journal of Biopharmaceutical Statistics (2023)

A limitation of the common measures of diagnostic test performance, such as sensitivity and specificity, is that they do not consider the relative importance of false negative and false positive test results, which are likely ...

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On Kernel-Based Estimator of Odds Ratio Using Different Stratified Sampling Schemes (Abbas Eftekharian, Hani Samawi and Haresh Rochani) Statistics, Optimization & Information Computing (2022)

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Performance of Diagnostic Tests Based on Continuous Bivariate Markers (Hani M. Samawi, Ding-Geng Chen, Jingjing Yin, et al.) Journal of Applied Statistics (2022)

In medical diagnostic research, it is customary to collect multiple continuous biomarker measures to improve the accuracy of diagnostic tests. A prevalent practice is to combine the measurements of these biomarkers into one single composite ...

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Model Parameters Estimation With Non-ignorable Missing Data Using Influential Exponential Tilting Resampling Approach (Kavita Gohil, Hani M. Samawi, Haresh Rochani, et al.) Journal of Statistical Computation and Simulation (2022)

This paper proposes to extend [1] mean functional estimation method based on the influential exponential tilting resampling approach (ITRA) to address non-ignorable missing data in linear model parameters statistical inference. The ITRA approach assumes that ...

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On Diagnostic Accuracy Measure With Cut-points Criterion for Ordinal Disease Classification Based on Concordance and Discordance (Jing Kersey, Hani Samawi, Jingjing Yin, et al.) Journal of Applied Statistics (2022)

The accuracy of a diagnostic test has always been essential in detecting disease staging. Many diagnostic tests of accuracy measures are used in binary diagnosis tests. Some measures apply to multi-stage diagnosis. Yet, there are ...

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Mean Functional Estimation With Non-ignorable Missing Data Using Influential Exponential Tilting Resampling Approach (Hani Samawi, Haresh Rochani and Kavita Gohil) Journal of Statistical Computation and Simulation (2022)

Inference with incomplete data, especially non-ignorable, is one of the challenging tasks in data analysis. Moreover, it is well known that results obtained from incomplete data are prone to bias. Parameter estimation with non-ignorable missing ...

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Statistical Analysis Based on Adaptive Progressive Hybrid Censored Data From Lomax Distribution (Amal Helu and Hani Samawi) Statistics, Optimization & Information Computing (2021)

In this article, we consider statistical inferences about the unknown parameters of the Lomax distribution basedon the Adaptive Type-II Progressive Hybrid censoring scheme, this scheme can save both the total test time and the cost ...

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Medical Diagnostics Accuracy Measures and Cut-point Selection: An Innovative Approach Based on Relative Net Benefit (Hani Samawi, Ding-Geng Chen, Ferdous Ahmed, et al.) Communications in Statistics - Theory and Methods (2021)

The evaluation of diagnostics tests based on net benefit involves both the accuracy of the tests and the clinical consequences of the diagnostic errors. Also, the benefit-risk measures approach depends on the prevalence of the ...

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On Kernel-based Quantile Estimation Using Different Stratified Sampling Schemes With Optimal Allocation (Abbas Eftekharian and Hani Samawi) Journal of Statistical Computation and Simulation (2021)

The kernel-based estimators of a quantile function based on stratified samples of simple random sampling and ranked set sampling methods are proposed. The expectations and variances of the estimators are analytically obtained as well as ...

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Joint Inference About the AUC and Youden Index for Paired Biomarkers (Jingjing Yin, Hani M. Samawi and Lili Tian) Statistics in Medicine (2021)

Work published in Statistics in Medicine.

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Quantiles Naïve, Ratio and Difference Estimators for Efficient Stratified Sampling Designs (Haresh Rochani, Hani W. Samawi and Xinyan Zhang) Journal of the Korean Statistical Society (2021)

This paper proposes and investigates the bivariate, the marginal distribution functions and quantiles estimators and their asymptotic properties for naïve, ratio, and difference estimators based on the bivariate stratified simple random sampling (BVSSRS) and bivariate ...

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Ranked Simulated Resampling: A More Efficient and Accurate Resampling Approximations for Bootstrap Inference (Hani Samawi and Ding-Geng Chen) Journal of Statistical Computation and Simulation (2021)

Since its invention, Efron’s bootstrap resampling approach has changed all the aspects of statistical inference, which has become the default framework whenever the classical inference approaches are not feasible. This paper introduces a new, more ...

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Post-Test Diagnostic Accuracy Measures of a Continuous Test With a Disease of Ordinal Multistages (Hani Samawi, Jingjing Yin, Haresh Rochani, et al.) Statistics in Biopharmaceutical Research (2021)

Positive predicted value and negative predicted value are used by clinicians to evaluate how likely a disease stage is present given the test results. In contrast, positive and negative likelihood ratios (LRs) are used in ...

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Meta-Analysis for Evaluating Diagnostic Accuracy (Jingjing Yin and Jing Kersey) Applied Meta-Analysis with R and Stata (2021)

Georgia Southern faculty members Jingjing Yin and Jing Kersey published Meta-Analysis for Evaluating Diagnostic Accuracy in Applied Meta-Analysis with R and Stata.

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Kernel-based estimation of P(X < Y) when X and Y are dependent random variables based on progressive type II censoring (Rola Musleh, Amal Helu and Hani Samawi) Communication in Statistics: Theory and Methods (2020)

The most widely used approach for reliability estimation is the well-known stress-strength model, θ = P(X < Y), where X and Y are random variables. In this model, the reliability, θ, of the system is ...

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Efficient Estimation of Cumulative Distribution Function Using Moving Extreme Ranked Set Sampling With Application to Reliability (Ehsan Zamanzade, M. Mahdizadeh and Hani Samawi) AStA Advances in Statistical Analysis (2020)

In this article, we consider the problem of estimating cumulative distribution function (CDF) and a reliability parameter using moving extreme ranked set sampling (MERSS). Two different CDF estimators are described and compared with their competitors ...

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Kullback-Leibler Divergence for Medical Diagnostics Accuracy and Cut-point Selection Criterion: How it is related to the Youden Index (Hani Samawi, Jingjing Yin, Xinyan Zhang, et al.) Journal of Applied Bioinformatics & Computational Biology (2020)

Recently, the Kullback-Leibler divergence (KL), which captures the disparity between two distributions, has been considered as an index for determining the diagnostic performance of markers. In this work, we propose using a total KL discrete ...

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Further Improving the Performance of Logistic Regression Analysis Using Double Extreme Ranking (Hani Samawi, Xinyan Zhang and Haresh Rochani) Journal of Statistical Theory and Practice (2020)

For dichotomous or ordinal dependent variables, logistic regression models as one of the generalized linear models have been intensively applied in several fields. We proposed a more powerful performance of logistic regression model analysis when ...

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Kernel density estimation based on progressive type-II censoring (Amal Helu, Hani Samawi, Haresh Rochani, et al.) Journal of the Korean Statistical Society (2020)

Progressive censoring is essential for researchers in industry as a mean to remove subjects before the final termination point in order to save time and reduce cost. Recently, kernel density estimation has been intensively investigated ...

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Mixture Ranked Set Sampling for Estimation of Population Mean and Median (Zahid Khan, Mahammad Ismail and Hani Samawi) Journal of Statistical Computation and Simulation (2019)

In this paper, a sampling scheme named ‘mixture ranked set sampling’ (MIRSS) for estimation of the population mean and median is suggested. The MIRSS is applicable when the ordinary RSS cannot be fully conducted in ...

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On Kernel-Based Mode Estimation Using Different Stratified Sampling Designs (Hani Samawi, Haresh Rochani, Jingjing Yin, et al.) Journal of Statistical Theory and Practice (2019)

In the literature, the properties and the application of mode estimation is considered under simple random sampling and ranked set sampling (RSS). We investigate some of the asymptotic properties of kernel density-based mode estimation using ...

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Quasi-likelihood Ratio Tests for Homoscedasticity of Variance in Linear Regression (Lili Yu, Varadan Sevilimedu, Robert Vogel, et al.) Journal of Modern Applied Statistical Methods (2019)

Two quasi-likelihood ratio tests are proposed for the homoscedasticity assumption in the linear regression models. They require few assumptions than the existing tests. The properties of the tests are investigated through simulation studies. An example ...

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Reducing Sample Size Needed for Cox-Proportional hazards model Analysis Using More Efficient Sampling Method (Hani Samawi, Lili Yu, Haresh Rochani, et al.) Communication of Statistics: Theory and Methods (2018)

In general, survival data are time-to-event data, such as time to death, time to appearance of a tumor, or time to recurrence of a disease. Models for survival data have frequently been based on the ...

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Application of the Misclassification Simulation Extrapolation Procedure to Log-Logistic Accelerated Failure Time Models in Survival Analysis (Varadan Sevilimedu, Lili Yu, Hani Samawi, et al.) Journal of Statistical Theory and Practice (2018)

Misclassification of binary covariates is pervasive in survival data, leading to inaccurate parameter estimates. Despite extensive research of misclassification error in Cox proportional hazards models, it has not been adequately researched in the context of ...

July 2019 - Present	Interim Department Chair, Georgia Southern University ‐ Department of Biostatistics, Epidemiology and Environmental Health Sciences
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
August 2014 - Present	Professor, Georgia Southern University ‐ Jiann-Ping Hsu College of Public Health
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
February 2013 - Present	Affiliate, Georgia Southern University ‐ Institute for Interdisciplinary STEM
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
Present	Professor, Georgia Southern University ‐ Department of Biostatistics, Epidemiology and Environmental Health Sciences
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
August 2008 - June 2016	Director of Karl E. Center for Biostatistics, Georgia Southern University
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
September 2007 - July 2014	Associate Professor Department of Biostatistics, Epidemiology and Environmental Health Sciences, Georgia Southern University
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution
August 2006 - August 2007	Assistant Professor Department of Biostatistics, Epidemiology and Environmental Health Sciences, Georgia Southern University
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2021	The Training in Informatics for Underrepresented Minorities in Public Health (TRIUMPH).
	University of Minnesota, Georgia Southern University, Bethune-Cookman University, University of South Florida, and 4 public health organizations (Georgia Coastal; HealtHIE Georgia; Minnesota Department of Health; and Volusia County Health Department)
	Role: Investigator
	Colleague(s): G. Shah (PI)
2017 - 2018	Reducing Food Waste as Part of Sustainability Efforts on Georgia Southern Campus
	Georgia Southern University
	Role: Co-PI
	Colleague(s): Evans Afriyie-Gyawu (PI), Becky Larson (Co-PI) & Joseph Telfair (Co-I)
	$26,470
2014 - 2015	Developing new method of evaluating and testing mediation effect when the mediators and the outcome variables are dichotomous
	Research Seed Funding Award
	Role: PI
	Colleague(s): Daniel Linder (Co-PI)
	$10,000
2012 - 2014	Identifying Risk Factors Contributing to Obesity in Chatham County, GA Neighborhoods (RIMI SSU NIH Grant)
	NIH, Federal
	Role: PI
	Colleague(s): Robert L. Vogel (Co-PI)
	$32,750
2010 - 2011	Travel grant for Faculty Development
	Center for Teaching, Learning and Scholarship, Georgia Southern University
	Role: PI
	$1,147
2010	Strengthening Research Collaborations in Health Disparities
	NIH, Federal - 1P20MD003941
	Role: PI
	Colleague(s): Robert L. Vogel (PI)
	$9,746
2009 - 2010	Developing more efficient tests of symmetry based on ordered samples and overlapping measures: Application to Public Health Problems
	Georgia Southern University
	Role: PI
	$12,354
2009	Verification of the Neutralizer process as a PFRP equivalent process for biosolids Disinfection
	BioChem Resources
	$1,100
2008 - 2009	Simulation Study to Investigate the Performance of Runs Test for Symmetry Using Median Ranked Set Sampling and its Applications to Public Health Problems
	Georgia Southern University
	Role: PI
	$7,008
2006	Relationship Between Water Intake and Children Health Issues in Jordan
	WHO
	$12,000
2001 - 2004	Statistical consultation and data analysis on voice and speech pathology
	Center for the Neural Basis of Cognition
	Role: Co-PI
	Colleague(s): Katherine Verdolini (PI)
	$20,000
1997	Attitudes of Jordanian people toward the new rules of the 1996 election for the lower house of Parliament
	Jordanian Statistics Department
	$13,000

2018 - Present	Member, College Curriculum Committee, GSU
2017 - Present	Member, Research Committee, GSU
2016 - Present	Member, Ad-hoc P&T Rubric Development Committee, GSU
2018 - 2019	Chair, P&T committee, GSU
2017 - 2019	Member, University Level Senate, GSU
2016 - 2019	Member, JPHCOPH award of excellence committee, GSU
2015 - 2019	Member, College Award Committee, GSU
2017 - 2018	Member, College P&T Committee, GSU
2016 - 2017	Chair, College P&T Committee, GSU
2016 - 2017	Member, University Level Senate, GSU
2015 - 2016	Chair, College P&T Committee, GSU
2015 - 2016	Member, University Level Senate, GSU
2014 - 2016	Member, Teaching Committee, GSU
2010 - 2016	Member, Library Committee, GSU
2014 - 2015	Chair, College P&T Committee, GSU
2014 - 2015	Committee member, College P&T Processing Committee, GSU
2014 - 2015	Member, Committee of Academic Standard, GSU
2014 - 2015	Member, Faculty Welfare Committee, GSU
2013 - 2014	Member, College P&T Committee, GSU
2012 - 2013	Member, College P&T Committee, GSU

1994	Ph.D. in Biostatistics, University of Iowa
Institution Organization Student Type Student Title Degree Time Period to Options Currently enrolled Affiliate my profile with this Institution
1991	M.S. in Applied Statistics, University of Iowa
Institution Organization Student Type Student Title Degree Time Period to Options Currently enrolled Affiliate my profile with this Institution
1986	M.S. in Statistics, Yarmouk University
Institution Organization Student Type Student Title Degree Time Period to Options Currently enrolled Affiliate my profile with this Institution
1981	B.S. in Mathematics/Statistics, Yarmouk University
Institution Organization Student Type Student Title Degree Time Period to Options Currently enrolled Affiliate my profile with this Institution

About Hani M. Samawi

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Refereed Journal Articles (135)