Works (40)

Updated: July 19th, 2023 21:17

2022 journal article

Hands-on childcare garden intervention: A randomized controlled trial to assess effects on fruit and vegetable identification, liking, and consumption among children aged 3-5 years in North Carolina

FRONTIERS IN PSYCHOLOGY, 13.

By: N. Cosco nโ€‰, N. Wellsโ€‰*, D. Zhang n, L. Goodell n, M. Monsur*, T. Xuโ€‰*, R. Moore n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: childcare; gardening; garden intervention; randomized controlled trial; healthy eating; diet; preschool; children
Sources: Web Of Science, ORCID
Added: December 19, 2022

2021 journal article

Research Design, Protocol, and Participant Characteristics of COLEAFS: A Cluster Randomized Controlled Trial of a Childcare Garden Intervention

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 18(24).

By: N. Cosco nโ€‰, N. Wellsโ€‰*, M. Monsur*, L. Goodell n, D. Zhang n, T. Xuโ€‰*, D. Halesโ€‰*, R. Moore n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: children; childcare; gardening; randomized controlled trial; healthy eating; physical activity
MeSH headings : Child; Child Care; Child, Preschool; Fruit; Gardening; Gardens; Health Promotion; Humans; Research Design; Vegetables
Sources: Web Of Science, ORCID
Added: January 18, 2022

2019 review

Statistical Analysis of Zero-Inflated Nonnegative Continuous Data: A Review

[Review of ]. STATISTICAL SCIENCE, 34(2), 253โ€“279.

By: L. Liu, Y. Shih, R. Strawderman, D. Zhang*, B. Johnson & H. Chai

author keywords: Two-part model; Tobit model; health econometrics; semiparametric regression; joint model; cure rate; frailty model; splines
Source: Web Of Science
Added: August 5, 2019

2016 journal article

A flexible model for correlated medical costs, with application to medical expenditure panel survey data

STATISTICS IN MEDICINE, 35(6), 883โ€“894.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: model selection; generalized linear model; health econometrics; semiparametric regression; generalized estimating equation
MeSH headings : Aged; Aged, 80 and over; Bias; Computer Simulation; Data Interpretation, Statistical; Health Care Costs / statistics & numerical data; Health Care Costs / trends; Health Expenditures / statistics & numerical data; Health Expenditures / trends; Humans; Linear Models; Male; Models, Economic; United States
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Bivariate Mixed Effects Analysis of Clustered Data with Large Cluster Sizes

STATISTICS IN BIOSCIENCES, 8(2), 220โ€“233.

By: D. Zhang n, J. Sunโ€‰* & K. Pieper*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Meta-analysis; Missing data; Multi-center studies
Source: Web Of Science
Added: August 6, 2018

2015 journal article

A fast EM algorithm for fitting joint models of a binary response and multiple longitudinal covariates subject to detection limits

COMPUTATIONAL STATISTICS & DATA ANALYSIS, 85, 37โ€“53.

By: P. Bernhardt*, D. Zhang n & H. Wangโ€‰*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Detection limit; EM algorithm; Joint model; Logistic regression; Multiple longitudinal covariates; Normal approximation
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Assessing gene-environment interactions for common and rare variants with binary traits using gene-trait similarity regression

Genetics, 199(3), 695-.

By: G. Zhao, R. Marceau, D. Zhang & J. Tzeng

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Statistical Methods for Generalized Linear Models with Covariates Subject to Detection Limits

Statistics in Biosciences, 7(1), 68โ€“89.

By: P. Bernhardt*, H. Wang n & D. Zhang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Censored predictor; Complete case; Conditional mean imputation; Detection limit; Improper multiple imputation
Source: Crossref
Added: November 21, 2020

2014 journal article

Flexible modeling of survival data with covariates subject to detection limits via multiple imputation

COMPUTATIONAL STATISTICS & DATA ANALYSIS, 69, 81โ€“91.

By: P. Bernhardt n, H. Wang n & D. Zhang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Accelerated failure time model; Censored predictor; Complete case; Detection limit; Multiple imputation; Seminonparametric distribution
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Pathway-Guided Identification of Gene-Gene Interactions

ANNALS OF HUMAN GENETICS, 78(6), 478โ€“491.

By: X. Wang n, D. Zhang n & J. Tzeng n

co-author countries: Taiwan, Province of China ๐Ÿ‡น๐Ÿ‡ผ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Pathway analysis; gene-gene interactions; bio-knowledge-guided
MeSH headings : Computer Simulation; Epistasis, Genetic; Genotype; Humans; Linear Models; Models, Genetic; Polymorphism, Single Nucleotide; Principal Component Analysis; Regression Analysis
Source: Web Of Science
Added: August 6, 2018

2013 journal article

A flexible model for the mean and variance functions, with application to medical cost data

STATISTICS IN MEDICINE, 32(24), 4306โ€“4318.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: generalized linear model; semiparametric regression; health econometrics; smoothing parameter; generalized cross-validation
MeSH headings : Computer Simulation; Delivery of Health Care / economics; Heart Failure / economics; Humans; Likelihood Functions; Models, Economic; Models, Statistical; Virginia
Source: Web Of Science
Added: August 6, 2018

2013 chapter

Constructing Conditional Reference Charts for Grip Strength Measured with Error

In Springer Proceedings in Mathematics & Statistics (pp. 299โ€“310).

By: P. Torres*, D. Zhang n & H. Wangโ€‰ n

co-author countries: Puerto Rico ๐Ÿ‡ต๐Ÿ‡ท United States of America ๐Ÿ‡บ๐Ÿ‡ธ
Source: Crossref
Added: August 28, 2020

2012 journal article

A Semi-nonparametric Approach to Joint Modeling of A Primary Binary Outcome and Longitudinal Data Measured at Discrete Informative Times

Statistics in Biosciences, 4(2), 213โ€“234.

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: EM algorithm; Informative observation times; IVF; Joint model; Longitudinal data; Maximum likelihood estimation; SNP density
Source: Crossref
Added: August 28, 2020

2012 journal article

Trajectory Analyses in Alcohol Treatment Research

ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH, 36(8), 1442โ€“1448.

By: J. Chenโ€‰*, B. Johnson*, X. Wang*, J. O'Quigleyโ€‰*, M. Isaac, D. Zhang n, L. Liuโ€‰*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Alcohol Research; Clinical Trial; Grace Periods; Splines; Mixed Model
MeSH headings : Acamprosate; Adult; Aged; Aged, 80 and over; Alcohol Deterrents / therapeutic use; Alcoholism / drug therapy; Alcoholism / therapy; Algorithms; Behavior Therapy; Combined Modality Therapy; Data Interpretation, Statistical; Double-Blind Method; Female; Fructose / analogs & derivatives; Fructose / therapeutic use; Humans; Linear Models; Male; Middle Aged; Models, Statistical; Naltrexone / therapeutic use; Narcotic Antagonists / therapeutic use; Neuroprotective Agents / therapeutic use; Nonlinear Dynamics; Regression Analysis; Research / statistics & numerical data; Research Design; Taurine / analogs & derivatives; Taurine / therapeutic use; Topiramate; Treatment Outcome; Young Adult
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Studying Gene and Gene-Environment Effects of Uncommon and Common Variants on Continuous Traits: A Marker-Set Approach Using Gene-Trait Similarity Regression

AMERICAN JOURNAL OF HUMAN GENETICS, 89(2), 277โ€“288.

co-author countries: United Kingdom of Great Britain and Northern Ireland ๐Ÿ‡ฌ๐Ÿ‡ง United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Chromosomes, Human, Pair 21 / genetics; Computer Simulation; Databases, Genetic; Environment; Genes / genetics; Genetic Markers; Humans; Models, Genetic; Mutation / genetics; Quantitative Trait, Heritable; Regression Analysis
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Placebo Effect in Canine Epilepsy Trials

JOURNAL OF VETERINARY INTERNAL MEDICINE, 24(1), 166โ€“170.

By: K. Munana nโ€‰, D. Zhang n & E. Patterson*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ

Contributors: K. Muรฑana nโ€‰, D. Zhang n & E. Patterson*

author keywords: Clinical trials; Dog; Epilepsy; Statistical modeling
MeSH headings : Animals; Anticonvulsants / therapeutic use; Bromides / therapeutic use; Diet / veterinary; Dog Diseases / diet therapy; Dog Diseases / drug therapy; Dogs; Epilepsy / diet therapy; Epilepsy / drug therapy; Epilepsy / veterinary; Linear Models; Phenobarbital / therapeutic use; Placebo Effect; Potassium Compounds / therapeutic use
Sources: Web Of Science, ORCID
Added: August 6, 2018

2010 journal article

The use of pooled vs serial urine samples to measure urine protein:creatinine ratios

VETERINARY CLINICAL PATHOLOGY, 39(1), 53โ€“56.

By: D. LeVine n, D. Zhang n, T. Harris n & S. Vaden n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Dog; proteinuria; protein:creatinine ratio; UPC
MeSH headings : Animals; Creatinine / urine; Dog Diseases / diagnosis; Dog Diseases / urine; Dogs; Kidney Failure, Chronic / urine; Kidney Failure, Chronic / veterinary; Proteinuria / veterinary; Specimen Handling
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Variable Selection for Semiparametric Mixed Models in Longitudinal Studies

BIOMETRICS, 66(1), 79โ€“88.

By: X. Ni*, D. Zhang n & H. Zhang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Correlated data; Gaussian stochastic process; Linear mixed models; Smoothly clipped absolute deviation; Smoothing splines
MeSH headings : Algorithms; Bayes Theorem; Biometry / methods; Computer Simulation; Data Interpretation, Statistical; Epidemiologic Methods; Information Storage and Retrieval / methods; Longitudinal Studies; Models, Statistical
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Automatic model selection for partially linear models

JOURNAL OF MULTIVARIATE ANALYSIS, 100(9), 2100โ€“2111.

By: X. Ni n, H. Zhang n & D. Zhang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Semiparametric regression; Smoothing splines; Smoothly clipped absolute deviation; Variable selection
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Gene-Trait Similarity Regression for Multimarker-Based Association Analysis

Biometrics, 65(3), 822โ€“832.

By: J. Tzeng n, D. Zhang n, S. Chang*, D. Thomasโ€‰* & M. Davidian nโ€‰

co-author countries: Taiwan, Province of China ๐Ÿ‡น๐Ÿ‡ผ United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Chromosome Mapping / methods; Computer Simulation; Genetic Linkage / genetics; Genetic Markers / genetics; Haplotypes / genetics; Humans; Models, Genetic; Models, Statistical; Quantitative Trait Loci / genetics; Regression Analysis
Sources: NC State University Libraries, ORCID, Crossref
Added: August 6, 2018

2009 journal article

Power and sample size calculation for log-rank test with a time lag in treatment effect

STATISTICS IN MEDICINE, 28(5), 864โ€“879.

By: D. Zhang n & H. Quanโ€‰*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: censoring; intent-to-treat analysis; treatment termination
MeSH headings : Algorithms; Cardiovascular Diseases / drug therapy; Clinical Trials as Topic; Computer Simulation; Epidemiologic Research Design; Humans; Proportional Hazards Models; Sample Size; Statistics, Nonparametric; Time Factors; Treatment Outcome
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Anti-Mullerian hormone and inhibin B in the definition of ovarian aging and the menopause transition

JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM, 93(9), 3478โ€“3483.

By: M. Sowers*, A. Eyvazzadeh*, D. McConnell*, M. Yosef*, M. Jannausch*, D. Zhang n, S. Harlowโ€‰*, J. Randolph*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Adult; Aging / blood; Aging / physiology; Anti-Mullerian Hormone / blood; Anti-Mullerian Hormone / physiology; Biomarkers / blood; Cohort Studies; Female; Follicle Stimulating Hormone / blood; Forecasting; Humans; Inhibins / blood; Inhibins / physiology; Menopause / blood; Menopause / physiology; Menstruation / blood; Middle Aged; Models, Biological; Ovary / physiology
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Analysis of a binary composite endpoint with missing data in components

STATISTICS IN MEDICINE, 26(26), 4703โ€“4718.

By: H. Quanโ€‰*, D. Zhang n, J. Zhangโ€‰* & L. Devlamynck*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: EM algorithm; event rate; missing at random; maximum likelihood estimate
MeSH headings : Algorithms; Clinical Trials as Topic; Data Interpretation, Statistical; Endpoint Determination / statistics & numerical data; Humans; Leg; Likelihood Functions; Orthopedics; United States; Venous Thromboembolism / prevention & control
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Haplotype-based association analysis via variance-components score test

AMERICAN JOURNAL OF HUMAN GENETICS, 81(5), 927โ€“938.

By: J. Tzeng n & D. Zhang n

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Amyotrophic Lateral Sclerosis / genetics; Computer Simulation; Databases, Genetic; Genetic Predisposition to Disease; Haplotypes; Humans; Likelihood Functions; Models, Genetic; Polymorphism, Single Nucleotide / genetics; Quantitative Trait, Heritable
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Likelihood and pseudo-likelihood methods for semiparametric joint models for a primary endpoint and longitudinal data

Computational Statistics & Data Analysis, 51(12), 5776โ€“5790.

By: E. Li*, D. Zhang n & M. Davidian nโ€‰

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: conditional score; generalized linear model; mixed effects model; pseudo-likelihood; seminonparametric density
Sources: Crossref, Web Of Science, ORCID
Added: August 6, 2018

2007 journal article

Two-stage functional mixed models for evaluating the effect of longitudinal covariate profiles on a scalar outcome

BIOMETRICS, 63(2), 351โ€“362.

By: D. Zhang n, X. Linโ€‰* & M. Sowers*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: longitudinal covariates; mixed effects models; nonparametric regression; periodic smoothing spline; restricted maximum likelihood; variance components
MeSH headings : Analysis of Variance; Biometry; Bone Density / physiology; Female; Follicle Stimulating Hormone / urine; Humans; Likelihood Functions; Linear Models; Longitudinal Studies; Menopause; Menstrual Cycle; Models, Statistical; Regression Analysis; Statistics, Nonparametric
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Smoothing spline-based score tests for proportional hazards models

BIOMETRICS, 62(3), 803โ€“812.

By: J. Lin*, D. Zhang n & M. Davidian nโ€‰

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: Cox model; penalized partial likelihood; smoothing parameter; variance component
MeSH headings : Analysis of Variance; Biometry / methods; Breast Neoplasms / drug therapy; Breast Neoplasms / metabolism; Clinical Trials as Topic / statistics & numerical data; Female; Humans; Likelihood Functions; Menopause; Proportional Hazards Models; Receptors, Estrogen / metabolism
Sources: Web Of Science, ORCID
Added: August 6, 2018

2005 journal article

Sarcopenia is related to physical functioning and leg strength in middle-aged women

JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES, 60(4), 486โ€“490.

By: M. Sowers, M. Crutchfield, K. Richards, M. Wilkin, A. Furniss, M. Jannausch, D. Zhang*, M. Gross

MeSH headings : Adipose Tissue / pathology; Adult; Black or African American; Aging / pathology; Aging / physiology; Body Composition / physiology; Body Mass Index; Electric Impedance; Female; Follow-Up Studies; Gait / physiology; Humans; Isometric Contraction / physiology; Longitudinal Studies; Lower Extremity / physiology; Middle Aged; Motor Activity / physiology; Muscle, Skeletal / pathology; Muscle, Skeletal / physiopathology; Muscular Atrophy / pathology; Muscular Atrophy / physiopathology; Walking / physiology; White People
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Conditional estimation for generalized linear models when covariates are subject-specific parameters in a mixed model for longitudinal measurements

Biometrics, 60(1), 07-.

By: E. Li, D. Zhang & M. Davidianโ€‰

Source: NC State University Libraries
Added: August 6, 2018

2004 journal article

Construction and evaluation of cDNA libraries for large-scale expressed sequence tag sequencing in wheat (Triticum aestivum L.)

GENETICS, 168(2), 595โ€“608.

By: D. Zhang*, D. Choiโ€‰*, S. Wanamaker*, R. Fenton*, A. Chin*, M. Malatrasi*, Y. Turuspekovโ€‰*, H. Waliaโ€‰* ...

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : Expressed Sequence Tags / chemistry; Gene Library; Genetic Vectors; Sequence Analysis, DNA; Subtraction Technique; Triticum / genetics
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Generalized linear mixed models with varying coefficients for longitudinal data

Biometrics, 60(1), 15-.

By: D. Zhang

Source: NC State University Libraries
Added: August 6, 2018

2004 journal article

Likelihood and conditional likelihood inference for generalized additive mixed models for clustered data

JOURNAL OF MULTIVARIATE ANALYSIS, 91(1), 90โ€“106.

By: D. Zhang n & M. Davidian nโ€‰

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: longitudinal data; marginal likelihood; nonparametric regression; smoothing spline; variance component
Sources: Web Of Science, ORCID
Added: August 6, 2018

2003 journal article

Hypothesis testing in semiparametric additive mixed models

Biostatistics (Oxford, England), 4(1), 57โ€“74.

By: D. Zhang & X. Lin

Source: NC State University Libraries
Added: August 6, 2018

2002 journal article

A Monte Carlo EM algorithm for generalized linear mixed models with flexible random effects distribution

Biostatistics (Oxford, England), 3(3), 347โ€“360.

By: J. Chen, D. Zhang & M. Davidianโ€‰

Source: NC State University Libraries
Added: August 6, 2018

2002 journal article

Randomized COMparison of platelet inhibition with abciximab, TiRofiban and eptifibatide during percutaneous coronary intervention in acute coronary syndromes - The COMPARE trial

Circulation (New York, N.Y. : 1950), 106(12), 1470โ€“1476.

Daowen Zhang; Marie Davidian

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

Linear mixed models with flexible distributions of random effects for longitudinal data

BIOMETRICS, 57(3), 795โ€“802.

By: D. Zhang n & M. Davidian nโ€‰

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: longitudinal data; multimodality; random effects; seminonparametric density; semiparametric mixed effects model; skewness
MeSH headings : Biometry; Cholesterol / blood; Data Interpretation, Statistical; Humans; Likelihood Functions; Linear Models; Longitudinal Studies
Sources: Web Of Science, ORCID
Added: August 6, 2018

2001 journal article

Semiparametric nonlinear mixed-effects models and their applications - Comment

Journal of the American Statistical Association, 96(456), 1288โ€“1291.

By: X. Lin & D. Zhang

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

A scaled linear mixed model for multiple outcomes

Biometrics, 56(2), 593โ€“601.

By: X. Lin*, L. Ryanโ€‰*, M. Sammelโ€‰*, D. Zhang n, C. Padungtod* & X. Xuโ€‰*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
MeSH headings : China; Cohort Studies; Computer Simulation; Data Interpretation, Statistical; Humans; Likelihood Functions; Male; Models, Statistical; Occupational Exposure; Pesticides; Semen
Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Semiparametric regression for periodic longitudinal hormone data from multiple menstrual cycles

BIOMETRICS, 56(1), 31โ€“39.

By: D. Zhang n, X. Linโ€‰* & M. Sowers*

co-author countries: United States of America ๐Ÿ‡บ๐Ÿ‡ธ
author keywords: nonparametric regression; penalized likelihood; periodic smoothing spline; restricted maximum likelihood; test for equality of functions
MeSH headings : Biometry; Chi-Square Distribution; Female; Humans; Likelihood Functions; Longitudinal Studies; Menstrual Cycle / blood; Models, Statistical; Progesterone / blood; Regression Analysis; Stochastic Processes
Source: Web Of Science
Added: August 6, 2018

1999 journal article

Inference in generalized additive mixed models by using smoothing splines

Journal of the Royal Statistical Society. Series B, Methodological, 61(1999), 381โ€“400.

By: X. Lin & D. Zhang

Source: NC State University Libraries
Added: August 6, 2018

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