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Charles E. Leonard · SciRah

Researcher profile · Semantic Scholar

Charles E. Leonard

University of Pennsylvania Perelman School of Medicine

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Charles E. Leonard — researcher profile on SciRah

ORCID iD 0000-0002-5092-9657Homepage

h-index: 30
Works: 158
Citations: 3,091

Most-cited papers

Prepared for The Journal of Pharmacoepidemiology and Drug Safety
J. Mao, Annie Chung, A. Benton, Shawndra Hill +4 more
2013Pharmacoepidemiology and Drug Safety102 citations Open access
Semantic Scholar
Prevalence of diabetes, diabetic foot ulcer, and lower extremity amputation among Medicare beneficiaries, 2006 to 2008
D. Margolis, D. Malay, O. Hoffstad, Charles E. Leonard +5 more
201198 citations
Semantic Scholar
Proton pump inhibitors and traditional nonsteroidal anti‐inflammatory drugs and the risk of acute interstitial nephritis and acute kidney injury
Charles E. Leonard, Cristin Freeman, C. Newcomb, P. Reese +4 more
2012Pharmacoepidemiology and Drug Safety85 citations
Semantic Scholar
Risk of Nonunion with Nonselective NSAIDs, COX-2 Inhibitors, and Opioids.
Michael D. George, J. Baker, Charles E. Leonard, S. Mehta +2 more
2020Journal of Bone and Joint Surgery. American volume72 citations Open access
Semantic Scholar
Comparative risk of serious hypoglycemia with oral antidiabetic monotherapy: a retrospective cohort study
Charles E. Leonard, Xu Han, C. Brensinger, W. Bilker +3 more
2017Pharmacoepidemiology and Drug Safety69 citations Open access
Semantic Scholar
Antipsychotics and the Risks of Sudden Cardiac Death and All-Cause Death: Cohort Studies in Medicaid and Dually-Eligible Medicaid-Medicare Beneficiaries of Five States
Charles E. Leonard, Cristin Freeman, C. Newcomb, W. Bilker +3 more
2012Journal of Clinical & Experimental Cardiology69 citations Open access
Semantic Scholar
Risk for Recurrent Venous Thromboembolism and Bleeding With Apixaban Compared With Rivaroxaban: An Analysis of Real-World Data
G. Dawwas, Charles E. Leonard, James D. Lewis, A. Cuker
2021Annals of Internal Medicine56 citations
Semantic Scholar
Assessment of Physician Prescribing of Muscle Relaxants in the United States, 2005-2016
Samantha E. Soprano, S. Hennessy, W. Bilker, Charles E. Leonard
2020JAMA Network Open48 citations Open access
Semantic Scholar
Pro- and anti-arrhythmic actions of sulfonylureas: mechanistic and clinical evidence
Charles E. Leonard, S. Hennessy, Xu Han, D. Siscovick +2 more
2017Trends in endocrinology and metabolism39 citations Open access
Semantic Scholar
The quality of Medicaid and Medicare data obtained from CMS and its contractors: implications for pharmacoepidemiology
Charles E. Leonard, C. Brensinger, Young Hee Nam, W. Bilker +3 more
2017BMC Health Services Research38 citations Open access
Semantic Scholar
Sentinel Modular Program for Propensity-Score Matched Cohort Analyses: Application to Glyburide, Glipizide, and Serious Hypoglycemia
Meijia Zhou, Shirley V. Wang, Charles E. Leonard, J. Gagne +12 more
2017Epidemiology34 citations Open access
Semantic Scholar
Effectiveness of Interventions in Reducing Antibiotic Use for Upper Respiratory Infections in Ambulatory Care Practices
C. Vinnard, D. Linkin, A. Localio, Charles E. Leonard +3 more
2013Population health management34 citations Open access
Semantic Scholar
Gastrointestinal bleeding and intracranial hemorrhage in concomitant users of warfarin and antihyperlipidemics
Charles E. Leonard, C. Brensinger, W. Bilker, S. Kimmel +5 more
2016International Journal of Cardiology32 citations Open access
Semantic Scholar
Comparative risk of ischemic stroke among users of clopidogrel together with individual proton pump inhibitors
Charles E. Leonard, W. Bilker, C. Brensinger, D. Flockhart +4 more
2015Stroke32 citations Open access
Semantic Scholar
Comparative Safety of Sulfonylureas and the Risk of Sudden Cardiac Arrest and Ventricular Arrhythmia
Charles E. Leonard, C. Brensinger, C. Aquilante, W. Bilker +6 more
2018Diabetes Care30 citations Open access
Semantic Scholar
Serious hypoglycemia and use of warfarin in combination with sulfonylureas or metformin
Young Hee Nam, C. Brensinger, W. Bilker, Charles E. Leonard +2 more
2018Clinical pharmacology and therapy27 citations Open access
Semantic Scholar
Validity of ICD‐10‐CM diagnoses to identify hospitalizations for serious infections among patients treated with biologic therapies
V. Lo Re, Dena M. Carbonari, Jerry Jacob, William R. Short +15 more
2021Pharmacoepidemiology and Drug Safety26 citations
Semantic Scholar
Comparative Safety of Sodium-Glucose Cotransporter 2 Inhibitors Versus Dipeptidyl Peptidase 4 Inhibitors and Sulfonylureas on the Risk of Diabetic Ketoacidosis.
G. Dawwas, J. Flory, S. Hennessy, Charles E. Leonard +1 more
2022Diabetes Care25 citations Open access
Semantic Scholar
Preoperative Sedative-hypnotic Medication Use and Adverse Postoperative Outcomes
Timothy G. Gaulton, H. Wunsch, Lakisha J. Gaskins, Charles E. Leonard +8 more
2019Annals of Surgery25 citations Open access
Semantic Scholar
Screening to identify signals of opioid drug interactions leading to unintentional traumatic injury
Charles E. Leonard, C. Brensinger, T. P. Pham Nguyen, J. Horn +8 more
2020Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie24 citations Open access
Semantic Scholar
Biomedical Informatics Approaches to Identifying Drug-Drug Interactions: Application to Insulin Secretagogues
Xu Han, Chien-Wei Chiang, Charles E. Leonard, W. Bilker +3 more
2017Epidemiology23 citations Open access
Semantic Scholar
Identifying Clinically Relevant Drug–Drug Interactions With Methadone and Buprenorphine: A Translational Approach to Signal Detection
T. Miano, Lei Wang, Charles E. Leonard, C. Brensinger +10 more
2022Clinical pharmacology and therapy22 citations Open access
Semantic Scholar
Climate Change and Ambient Temperature Extremes: Association With Serious Hypoglycemia, Diabetic Ketoacidosis, and Sudden Cardiac Arrest/Ventricular Arrhythmia in People With Type 2 Diabetes.
Kacie Bogar, C. Brensinger, S. Hennessy, J. Flory +4 more
2022Diabetes Care22 citations Open access
Semantic Scholar
Diagnostic Algorithms for Cardiovascular Death in Administrative Claims Databases: A Systematic Review
Sonal Singh, H. Fouayzi, Kathryn Anzuoni, L. Goldman +16 more
2018Drug Safety22 citations
Semantic Scholar
Brief Report: Biosimilar Uptake in the Academic and Veterans Health Administration Settings: Influence of Institutional Incentives
J. Baker, Charles E. Leonard, V. L. Re, M. Weisman +2 more
2020Arthritis & Rheumatology21 citations Open access
Semantic Scholar
Clopidogrel Drug Interactions and Serious Bleeding: Generating Real World Evidence via Automated High-Throughput Pharmacoepidemiologic Screening
Charles E. Leonard, Meijia Zhou, C. Brensinger, W. Bilker +5 more
2019Clinical pharmacology and therapy21 citations Open access
Semantic Scholar
Chart validation of inpatient ICD-9-CM administrative diagnosis codes for acute myocardial infarction (AMI) among intravenous immune globulin (IGIV) users in the Sentinel Distributed Database
Eric M. Ammann, Marin L. Schweizer, J. Robinson, Jayasheel O Eschol +9 more
2018Pharmacoepidemiology and Drug Safety21 citations Open access
Semantic Scholar
Research and scholarly methods: Propensity scores
Dominique Medaglio, A. Stephens-Shields, Charles E. Leonard
2022Journal of the American College of Clinical Pharmacy20 citations Open access
Semantic Scholar
The risk of sudden cardiac arrest and ventricular arrhythmia with rosiglitazone versus pioglitazone: real-world evidence on thiazolidinedione safety
Charles E. Leonard, C. Brensinger, G. Dawwas, R. Deo +9 more
2020Cardiovascular Diabetology19 citations Open access
Semantic Scholar
The Trend-in-Trend Research Design for Causal Inference
Xinyao Ji, Dylan S. Small, Charles E. Leonard, S. Hennessy
2017Epidemiology19 citations Open access
Semantic Scholar
Chart validation of inpatient International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) administrative diagnosis codes for venous thromboembolism (VTE) among intravenous immune globulin (IGIV) users in the Sentinel Distributed Database
Eric M. Ammann, A. Cuker, R. Carnahan, Usha S. Perepu +7 more
2018Medicine18 citations Open access
Semantic Scholar
Empiric Potassium Supplementation and Increased Survival in Users of Loop Diuretics
Charles E. Leonard, H. Razzaghi, Cristin Freeman, Jason A. Roy +2 more
2014PLoS ONE18 citations Open access
Semantic Scholar
High rate of recurrent venous thromboembolism in children and adolescents with unprovoked venous thromboembolism
H. Whitworth, Helen Havens Clark, R. Hubbard, C. Witmer +2 more
2022Journal of Thrombosis and Haemostasis15 citations Open access
Semantic Scholar
Pharmacoepidemiologic Screening of Potential Oral Anticoagulant Drug Interactions Leading to Thromboembolic Events
Meijia Zhou, Charles E. Leonard, C. Brensinger, W. Bilker +3 more
2020Clinical pharmacology and therapy15 citations Open access
Semantic Scholar
Nonsteroidal anti-inflammatory drug choice and adverse outcomes in clopidogrel users: A retrospective cohort study
Young Hee Nam, C. Brensinger, W. Bilker, Charles E. Leonard +4 more
2018PLoS ONE14 citations Open access
Semantic Scholar
Proton pump inhibitors do not impair the effectiveness of metformin in patients with diabetes.
J. Flory, K. Haynes, Charles E. Leonard, S. Hennessy
2015British Journal of Clinical Pharmacology14 citations Open access
Semantic Scholar
Risk of sudden cardiac arrest and ventricular arrhythmia with sulfonylureas: An experience with conceptual replication in two independent populations
Neil Dhopeshwarkar, C. Brensinger, W. Bilker, Samantha E. Soprano +5 more
2020Scientific Reports13 citations Open access
Semantic Scholar
Opioid Drug-Drug-Drug Interactions and Unintentional Traumatic Injury: Screening to Detect Three-Way Drug Interaction Signals
E. Acton, S. Hennessy, C. Brensinger, W. Bilker +7 more
2022Frontiers in Pharmacology11 citations Open access
Semantic Scholar
Pharmacosafety of fluoroquinolone and macrolide antibiotics in the clinical care of patients with myasthenia gravis
T. P. Pham Nguyen, Charles E. Leonard, S. Bird, A. Willis +1 more
2021Muscle and Nerve11 citations
Semantic Scholar
Drug–drug interaction between dexamethasone and direct-acting oral anticoagulants: a nested case–control study in the National COVID Cohort Collaborative (N3C)
O. Kravchenko, R. Boyce, A. Gómez-Lumbreras, Paul T. Kocis +7 more
2022BMJ Open10 citations Open access
Semantic Scholar
Effect of statins on the association between high temperature and all-cause mortality in a socioeconomically disadvantaged population: a cohort study
Young Hee Nam, W. Bilker, Charles E. Leonard, M. Bell +2 more
2019Scientific Reports10 citations Open access
Semantic Scholar
Population-based screening to detect benzodiazepine drug-drug-drug interaction signals associated with unintentional traumatic injury
Cheng Chen, S. Hennessy, C. Brensinger, E. Acton +7 more
2022Scientific Reports9 citations Open access
Semantic Scholar
Antidepressant drug–drug–drug interactions associated with unintentional traumatic injury: Screening for signals in real‐world data
Cheng Chen, S. Hennessy, C. Brensinger, W. Bilker +5 more
2022Clinical and Translational Science9 citations Open access
Semantic Scholar
Angiotensin‐Converting Enzyme Inhibitors Used Concomitantly with Insulin Secretagogues and the Risk of Serious Hypoglycemia
Young Hee Nam, C. Brensinger, W. Bilker, J. Flory +2 more
2021Clinical pharmacology and therapy9 citations Open access
Semantic Scholar
Impact of Hospitalization and Medication Switching on Post‐discharge Adherence to Oral Anticoagulants in Patients With Atrial Fibrillation
T. P. Pham Nguyen, Yong Chen, Dylan P. Thibault, Charles E. Leonard +2 more
2020Pharmacotherapy9 citations
Semantic Scholar
A Medical Resident-Pharmacist Collaboration Improves the Rate of Medication Reconciliation Verification at Discharge.
Daniel A. Caroff, Therese Bittermann, Charles E. Leonard, G. Gibson +1 more
2015Joint Commission Journal on Quality and Patient Safety9 citations
Semantic Scholar
Skeletal Muscle Relaxant Drug-Drug-Drug Interactions and Unintentional Traumatic Injury: Screening to Detect Three-Way Drug Interaction Signals
Cheng Chen, S. Hennessy, C. Brensinger, G. Dawwas +9 more
2022British Journal of Clinical Pharmacology8 citations Open access
Semantic Scholar
Chart validation of inpatient ICD-9-CM administrative diagnosis codes for ischemic stroke among IGIV users in the Sentinel Distributed Database
Eric M. Ammann, E. Leira, Scott K. Winiecki, N. Nagaraja +9 more
2017Medicine8 citations Open access
Semantic Scholar
Comparative risk of severe hypoglycemia among concomitant users of thiazolidinedione antidiabetic agents and antihyperlipidemics
Charles E. Leonard, Xu Han, W. Bilker, J. Flory +5 more
2016Diabetes Research and Clinical Practice8 citations Open access
Semantic Scholar
Effectiveness and Safety of Direct Oral Anticoagulants Versus Warfarin in Patients With Valvular Atrial Fibrillation
G. Dawwas, E. Dietrich, A. Cuker, G. Barnes +2 more
2021Annals of Internal Medicine7 citations
Semantic Scholar

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W. Bilker×25
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C. Brensinger×22
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J. Flory×10
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Samantha E. Soprano×7

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Young Hee Nam×6

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J. Gagne — researcher profile on SciRah

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T. Miano — researcher profile on SciRah

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S. Kimmel — researcher profile on SciRah

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T. P. Pham Nguyen — researcher profile on SciRah