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JaeJin An, PhD

Assistant Professor

College of Pharmacy

E-Mail: jan@westernu.edu

Phone: 8778


Ph.D. 2011
University of Southern California, Los Angeles, CA

B.Pharm. 2003
Ewha Woman’s University, South Korea

Research Interest

Her research interests include Comparative Effectiveness, Health Outcomes, Medication Utilizations, Medication Adherence, Predictive Modeling, and Pharmacoeconomics.

Research Grant

Co-Investigator, “Care Pathways in Patients with Rheumatoid Arthritis in an Integrated Healthcare System”, Bristol-Myers Squibb Company/Kaiser Permanente Southern California, 2017-2019

Co-Investigator, “Pill Burden and Medication Adherence and Persistence in Chronic Hepatitis C Patients”, Gilead Sciences, 2017-2018

Co-Investigator, “Evaluation of Anti-citrullinated Protein Antibodies and Rheumatoid Factor and Their Associations with Resource Utilizations and Costs in Rheumatoid Arthritis Patients in an Integrated Healthcare System”, Bristol-Myers Squibb Company/Kaiser Permanente Southern California, 2016-2017

Principal Investigator, “Unmet Anticoagulation Needs Among Non-Valvular Atrial Fibrillation Patients Managed within an Integrated Healthcare Delivery System”, Bristol-Myers Squibb Company, 2012-2015

Principal Investigator, “Diabetes Retinal Screening in a Managed Care Setting”, Genentech, 2013-2014

Principal Investigator, “Cardiovascular Risk in Patients with Rheumatoid Arthritis in a Managed Care Setting”, Bristol-Myers Squibb Company, 2012-2014

Co-Investigator, “Cardiovascular and Prostatic Safety of Testosterone Therapy in Aging Males”, National Institute of Aging, R01 Program, 2012-2014

Co-Investigator, “Impact of medication therapy discontinuation on glycemic control and health care utilization in patients with diabetes”, Merck, 2013-2014


An J, Niu F, Turpcu A, Rajput Y, Cheetham TC. Adherence to the American Diabetes Association Retinal Screening Guidelines for Population with Diabetes in the United States. Ophthalmic Epidemiol. 2018:1-9. doi: 10.1080/09286586.2018.1424344. 

Napier-Dovorany K, An J, Hoppe E. Factors Associated with Regular Interprofessional Care by Optometrists in Management of Patients with Diabetes Mellitus. Journal of Interprofessional Education & Practice. 2018;10(C):6-11. doi.org/10.1016/j.xjep.2017.10.003.
An J, Niu Fang, Zheng C, Rashid N, Mendes RA, Dills D, Vo L, Singh P, Bruno AS, Lang DT, Le PT, Jazdzewski KP, Aranda G Jr. Warfarin Management and Outcomes in Patients with Nonvalvular Atrial Fibrillation within an Integrated Healthcare System. J Manag Care Spec Pharm. 2017;23(6):700-712. (PMID: 28530526)

Cheetham TC, An J, Niu F, Jacobsen SJ, VanDenEeden S. Cardiovascular Safety of Testosterone Replacement Therapy in Androgen Deficient Males. JAMA Intern Med. 2017;177(4):491-499. (PMID: 28241244)

An J. The Impact of Patient-Centered Medical Homes on Quality of Care and Medication Adherence in Patients with Diabetes Mellitus. J Manag Care Spec Pharm. 2016 Nov;22(11):1272-1284. (PMID: 27783547)

An J, Alemao E, Reynolds KR, Kawabata H, Solomon DH, Liao KP, Niu F, Cheetham TC. Cardiovascular Outcomes Associated with Lowering Low-density Lipoprotein Cholesterol in Rheumatoid Arthritis and Matched Non-Rheumatoid Arthritis. J Rheumatol. 2016 Nov;43(11):1989-1996. (PMID: 27585690)

Reynolds K, An J, Wu J, Harrison TN, Wei R, Stuart B, Martin JP, Wlodarczyk CS, Rajpathak SN, Treatment Discontinuation of Oral Hypoglycemic Agents and Healthcare Utilization among Patients with Diabetes. J Diabetes Complications. 2016 Jul 26. pii: S1056-8727(16)30300-2. (PMID: 27506310)

An J, Cheetham TC, Reynolds K, Alemao E, Kawabata H, Liao KP, Solomon DH. Traditional Cardiovascular Risk Factor Management in Rheumatoid Arthritis Compared to Matched Non-Rheumatoid Arthritis in a US Managed Care Setting. Arthritis Care Res (Hoboken). 2016 May;68(5):629-37. (PMID: 26414069)

Zheng C, Rashid N, Koblick R, An J. Medication Extraction from Electronic Clinical Notes in an Integrated Health System: A Study on Aspirin Use in Patients with Nonvalvular Atrial Fibrillation. Clinical Therapeutics. Volume 37(9), 2015: 2048-2058. (PMID: 26233471)

An J, Niu F, Lang D, Jazdzewski K, Le PT, Rashid N, Meissner B, Mendes R, Dills D, Aranda G, Bruno A. Stroke and Bleeding Risk Associated with Antithrombotic Therapy for Patients with Non-Valvular Atrial Fibrillation in Clinical Practice. J Am Heart Assoc. 2015;4:e001921 doi: 10.1161/JAHA.115.001921 (PMID: 26187996)

An J, Nichol MB. Multiple Medication Adherence and its Effect on Clinical Outcomes Among Patients With Comorbid Type 2 Diabetes and Hypertension. Med Care. 2013 Oct;51(10):879-87. (PMID: 23929398)

Nichol MB, Wu J, An J, Huang J, Denham D, Frencher S, Jacobsen SJ. Budget Impact Analysis of New Prostate-Specific Antigen Assay and Index for Prostate Cancer Detection. Prostate Cancer and Prostatic Diseases. 2011;14:253-261. (PMID: 21537346)

Zeng F, An J, Scully R, Barrington C, Patel BV, Nichol MB. The Impact of Value-Based Benefit Design on Adherence to Diabetes Medications: A Propensity Score-Weighted Difference in Difference Evaluation. Value in Health. 2010;13:846-852. (PMID: 20561344)