2026 E. John Orav: Medicine Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Medicine	140	1695	1571	980	897	597	72969

E. John Orav publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where E. John Orav sits on this spectrum.

101 publications 1,796+

This scientist: 597 publications — 71st percentile

71% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

E. John Orav D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where E. John Orav sits on this spectrum.

70 D-Index 217+

This scientist: 140 D-Index — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

E. John Orav is affiliated with Harvard University in the United States. Their research spans multiple disciplines within medicine and health sciences, with a significant focus on health policy, healthcare management, and geriatric care.

The main fields of study for Orav include Medicine, Health Professions, and Economics, Econometrics and Finance. Their work also covers subfields such as Economics and Econometrics, General Health Professions, Geriatrics and Gerontology, Physiology, and Oncology.

Orav's research topics highlight healthcare policy and management, primary care and health outcomes, health systems evaluations and quality of life, geriatric care and nursing homes, frailty in older adults, economic impacts of cancer, and nutrition related to aging.

Frequently co-authoring with other researchers, Orav has collaborated notably with:

Heike A. Bischoff-Ferrari
José F. Figueroa
Reto W. Kressig
Arnold M. Epstein
Karen E. Joynt Maddox

The scientist has published extensively in venues focused on medicine and health systems, including:

JAMA Network Open
Journal of General Internal Medicine
Health Affairs
Journal of the American Geriatrics Society
JAMA

Some of Orav's recent papers include:

Effect of Vitamin D Supplementation, Omega-3 Fatty Acid Supplementation, or a Strength-Training Exercise Program on Clinical Outcomes in Older Adults, 2020, JAMA
Medicaid Expansion and Mortality Among Patients With Breast, Lung, and Colorectal Cancer, 2020, JAMA Network Open
Association of Nursing Home Ratings on Health Inspections, Quality of Care, and Nurse Staffing With COVID-19 Cases, 2020, JAMA
Declining Use of Primary Care Among Commercially Insured Adults in the United States, 2008-2016, 2020, Annals of Internal Medicine
Association of Dance-Based Mind-Motor Activities With Falls and Physical Function Among Healthy Older Adults, 2020, JAMA Network Open

Best Publications

Incidence and Types of Adverse Events and Negligent Care in Utah and Colorado

Eric Thomas;David Studdert;Helen Burstin;E. Orav

2504
Citations
Risk Factors for Retained Instruments and Sponges after Surgery

Atul A. Gawande;David M. Studdert;E. John Orav;Troyen A. Brennan

1611
Citations
Ventricular pacing or dual-chamber pacing for sinus-node dysfunction

Gervasio A. Lamas;Kerry L. Lee;Michael O. Sweeney;Russell Silverman

1275
Citations
Higher 25-hydroxyvitamin D concentrations are associated with better lower-extremity function in both active and inactive persons aged ≥60 y

Heike A Bischoff-Ferrari;Thomas Dietrich;E John Orav;Frank B Hu

1266
Citations
Somatization increases medical utilization and costs independent of psychiatric and medical comorbidity

Arthur J. Barsky;E. John Orav;David W. Bates

1142
Citations
Patients' Perception of Hospital Care in the United States

Ashish K Jha;E John Orav;Jie Zheng;Arnold M Epstein

1133
Citations
Prevention of Nonvertebral Fractures With Oral Vitamin D and Dose Dependency: A Meta-analysis of Randomized Controlled Trials

Heike A. Bischoff-Ferrari;Walter C. Willett;John B. Wong;Andreas E. Stuck

1119
Citations
Incidence, causes, and outcomes of dilated cardiomyopathy in children.

Jeffrey A. Towbin;April M. Lowe;Steven D. Colan;Lynn A. Sleeper

1103
Citations
Comparison of Hospital Mortality and Readmission Rates for Medicare Patients Treated by Male vs Female Physicians.

Yusuke Tsugawa;Anupam B. Jena;Jose F. Figueroa;E. John Orav

1073
Citations
A Pooled Analysis of Vitamin D Dose Requirements for Fracture Prevention

Heike A. Bischoff-Ferrari;Walter C. Willett;Endel J. Orav;Paul Lips

1025
Citations
Positive association between 25-hydroxy vitamin D levels and bone mineral density: a population-based study of younger and older adults.

Heike A Bischoff-Ferrari;Thomas Dietrich;E.John Orav;Bess Dawson-Hughes

1024
Citations
Readmissions, Observation, and the Hospital Readmissions Reduction Program

Rachael B. Zuckerman;Steven H. Sheingold;E. John Orav;Joel Ruhter

1018
Citations
Epidemiology of Sepsis Syndrome in 8 Academic Medical Centers

Kenneth E. Sands;David W. Bates;Paul N. Lanken;Paul S. Graman

1005
Citations
Female sex and higher drug dose as risk factors for late cardiotoxic effects of doxorubicin therapy for childhood cancer.

Lipshultz Se;Lipsitz;Mone Sm;Goorin Am

913
Citations
The incidence of pediatric cardiomyopathy in two regions of the United States.

Steven E. Lipshultz;Lynn A. Sleeper;Jeffrey A. Towbin;April M. Lowe

911
Citations
Effects of oral administration of type II collagen on rheumatoid arthritis.

DE Trentham;RA Dynesius-Trentham;EJ Orav;D Combitchi

884
Citations
Thirty-day readmission rates for Medicare beneficiaries by race and site of care.

Karen E. Joynt;E. John Orav;Ashish K. Jha

829
Citations
Quality of life and clinical outcomes in elderly patients treated with ventricular pacing as compared with dual-chamber pacing. Pacemaker Selection in the Elderly Investigators.

G A Lamas;E J Orav;B S Stambler;K A Ellenbogen

803
Citations
Double-blind pilot trial of oral tolerization with myelin antigens in multiple sclerosis

HL Weiner;GA Mackin;M Matsui;EJ Orav

770
Citations
A pooled analysis of Vitamin D dose requirements for fracture prevention

Bo Abrahamsen;Alison Avenell;Mark Bolland;Lars Rejnmark

9
Citations

Frequent Co-Authors

Ashish K. Jha Brown University

David W. Bates Brigham and Women's Hospital

Arnold M. Epstein Harvard University

Steven E. Lipshultz University at Buffalo, State University of New York

Steven D. Colan Boston Children's Hospital

Walter C. Willett Harvard University

Troyen A. Brennan Harvard University

Heike A. Bischoff-Ferrari University of Zurich

Lynn A. Sleeper Boston Children's Hospital

Bess Dawson-Hughes Tufts University

External Links

Personal website of E. John Orav

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