← Back to AHRM Inc. Select Publications & Presentations

A research record, three decades deep.

AHRM's work spans peer-reviewed journal articles in outlets such as Clinical Therapeutics, Value in Health, Diabetologia, and Frontiers in Gastroenterology, alongside posters and presentations at ISPOR, AMCP, the American Academy of Neurology, and other leading congresses.

23Peer-reviewed articles
34Posters & presentations
1995Earliest work
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All areasGastroenterology (13)Neurology & Movement Disorders (7)Urology & Pelvic Health (6)Behavioral & Mental Health (5)Oncology (4)Metabolic & Endocrine (4)Respiratory (3)Immunology & Infectious Disease (3)Cardiovascular (6)Other & Methods (6)
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Peer-Reviewed Publications Posters & Presentations
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Peer-Reviewed Publications (23)

2026
Weinstock L, Salt WB II, Cherry L, Tyson C, Magar R. A real-world assessment of healthcare resource utilization following IBS-Smart® and Trio-Smart® testing in patients with suspected irritable bowel syndrome. Frontiers in Gastroenterology. 2026; 5:1681818.
2020
Bernstein JA, Tyson C, Relan A, Adams P, Magar R. Modeling Cost-Effectiveness of On-Demand Treatment for Hereditary Angioedema. J Manag Care Spec Pharm. 2020 Feb;26(2):203-210.
2019
Kee-Ming Shu M, Fan K, Karikari K, Tyson C, Eddib A. Post-Operative Short-Term Outcomes of Robotic-Assisted Sacrocolpoperineopexy versus Sacrocolpopexy. Clinics in Surgery. 2019; 4: 2661.
2018
Fabian R, Tyson C, Tuma PL, Pegg IL, Sarkar A. A Horizontal Magnetic Tweezers and Its Use for Studying Single DNA Molecules. Micromachines. 2018; 9(4): 188.
2016
Pimentel M, Purdy C, Magar R, Rezaie A. A Predictive Model to Estimate Cost Savings of a Novel Diagnostic Blood Panel for Diagnosis of Diarrhea-predominant Irritable Bowel Syndrome. Clinical Therapeutics. 2016; 38(7):1638-1652.
McAndrew CP, Tyson C, Zischkau J, Mehl P, Tuma PL, Pegg IL, Sarkar A. Simple horizontal magnetic tweezers for micromanipulation of single DNA molecules and DNA–protein complexes. BioTechniques. 2016; 60(1):21–27.
2015
Tyson C, McAndrew CP, Tuma PL, Pegg IL, Sarkar A. Automated Nonparametric Method for Detection of Step-Like Features in Biological Data Sets. Cytometry Part A. 2015; 87A:393-404.
2012
Pimentel M, Schoenfeld P, Purdy CH, Gilbert C, Magar R. Cost Savings Associated With Rifaximin for Diarrhea-Predominant Irritable Bowel Syndrome. American Journal of Pharmacy Benefits. 2012;4(3):e65-e72.
2011
Santos-Oliveira R, Purdy C, da Silva MP, Dos Anjos Carneiro-Leão AM, Machado M, Einarson TR. Haemoglobin A(1c) levels and subsequent cardiovascular disease in persons without diabetes: a meta-analysis of prospective cohorts. Diabetologia. 2011; 54(6):1327-34.
2010
Czyrny JJ, Kaplan RE, Wilding GE, Purdy CH, Hirsh J. Electrical Foot Stimulation: A Potential New Method of Deep Venous Thrombosis Prophylaxis. Vascular. 2010; 18(1):20-27.
Canfield M, Keller C, Frydrych L, Ashrafioun L, Purdy C, Blondell R. Prescription Opioid Use Among Patients Seeking Treatment for Opioid Dependence. J Addict Med. 2010; 4:108-113.
2009
Frydrych LM, Greene BJ, Blondell RD, Purdy CH. Self-Help Components and Linkage to Aftercare Following Inpatient Detoxification. J Addict Dis. 2009; 28(1).
2005
Marchetti A, Magar R, Findley L, Larsen JP, Pirtosek Z, Ruzicka E, Jech R, Slawek J, Ahmed F. Retrospective Evaluation of the Dose of Dysport® and BOTOX® in the Management of Cervical Dystonia and Blepharospasm: The REAL DOSE Study. Movement Disorders. Apr 2005; 20(8):937–944.
2001
Marchetti A, Magar R, Lau H. Pharmacotherapies for attention-deficit/hyperactivity disorder: expected-cost analysis. Clin Ther. Nov 2001; 23(11):1904-21.
Marchetti A, Magar R, An P. Clinical and economic impact of new trends in glaucoma treatment. MedGenMed. Jul 26 2001; 3(4):6.
1996
Marchetti A, Magar R, Fischer J. A pharmacoeconomic evaluation of intravenous fosphenytoin (Cerebyx) versus intravenous phenytoin (Dilantin) in hospital emergency departments. Clin Ther. Sep-Oct 1996; 18(5):953-66.
1995
Magar RS, Doucette D, Kassam R, Seto W, Einarson TR. Warfarin in atrial fibrillation: a meta-analysis and pharmacoeconomic analysis. Canadian Journal of Clinical Pharmacology. 1995; 2:109-17.

Posters & Presentations (34)

2025
van Wagenberg F, Cherry L, Singh B, Ruiz S, Magar R. Clinical and Economic Impact of RBT-1 on Post-operative Complications and Costs for CABG and Valve Surgery. Presented at the 47th Annual Meeting of the Society of Cardiovascular Anesthesiologists (SCA), Montreal, Canada. April 2025.
2024
van Wagenberg F, Cherry L, Singh B, Ruiz S, Magar R. Impact of RBT-1 on Post-operative Complication Rates and Costs for Cardiac Surgery. Presented at AMCP Nexus 2024, Las Vegas, NV, USA. October 2024.
van Wagenberg F, Cherry L, Singh B, Ruiz S, Magar R. Impact of RBT-1, a Novel Treatment to Reduce Post-operative Complication Rates and Costs for Coronary Artery Bypass Graft (CABG) Surgery. Presented at AMCP Nexus 2024, Las Vegas, NV, USA. October 2024.
2019
Tyson C, Relan A, Adams P, Magar R. Cost-Effectiveness Model for On-Demand Treatment of HAE Attacks. Presented at AMCP Annual Meeting 2019, San Diego, CA, USA. 2019; 25(3a): S37-S38.
Shu M, Fan K, Karikari K, Tyson C, Eddib A. Post-Operative Short-Term Outcomes of Robotic Sacrocolpoperineopexy versus Robotic Sacrocolpopexy. Podium Presentation, 48th AAGL Global Congress of Minimally-Invasive Surgery 2019, Vancouver, BC, CA.
2017
Tyson C, Shafran I, Hilal R, Chalasani R, Good L, Taxman T, Maheshwari S, Silver HS, Glamour TS, Wallis BJ, Bradshaw T, Shaw A, Dalfonso LL, Magar R. Economic and Clinical Impact of Serum-Derived Bovine Immunoglobulin / Protein Isolate (SBI) in the Management of Chronic Diarrhea in Inflammatory Bowel Disease (IBD). Presented at ISPOR 20th Annual European Congress, Glasgow, Scotland. November 2017.
2015
Purdy C, Bytzer PM, Pimentel M, Magar R. A novel IBS diagnostic blood panel can enhance a positive diagnostic strategy versus a strategy of exclusion for patients with IBS-D: Cost implications for Denmark. Presented at ISPOR 18th Annual European Congress, Milan, IT. 2015.
Pimentel M, Purdy C, Magar R. Cost-minimization for a novel diagnostic blood panel versus standard exclusionary diagnostic testing for IBS-D: A United States perspective. Presented at ISPOR 18th Annual European Congress, Milan, IT. 2015.
Schmulson MJ, Castillo Barradas M, Pimentel M, Magar R, Purdy C. Impact of a novel IBS diagnostic blood panel for Mexico: Cost implications to the Mexican private practice for IBS-D. Presented at ISPOR 18th Annual European Congress, Milan, IT. 2015.
Soubieres A, Pimentel M, Purdy C, Magar R. Inclusion of a novel IBS blood panel for diagnosing IBS-D: A UK perspective. Presented at ISPOR 18th Annual European Congress, Milan, IT. 2015.
Gabbani T, Violanti C, Deiana S, Pimentel M, Purdy C, Magar R. Potential for cost savings associated with a novel IBS blood panel for diagnosing IBS-D: Italian perspective. Presented at ISPOR 18th Annual European Congress, Milan, IT. 2015.
Reddy A, Policastro A, Reppine A, Sekab J, Purdy C, Dalfonso L, Magar R. Assessing Migraine: An Enquiry into Prophylactic Treatment Patterns by Diagnosis: The AMEND Study. Presented at American Academy of Neurology Annual Meeting, Washington, DC. 2015.
2014
Gupta A, Lehman H, Dalfonso L, Gressani C, Purdy C, Wetzel L, Magar R. A Prospective Pilot Study Evaluating the HRQOL Impact of a Novel Air Purification Technology for Pediatric Asthma Patients. Presented at ISPOR Annual International Meeting, Montreal, QC, CA. 2014.
Blumenfeld A, Inocelda A, Cunanan C, Purdy C, Dalfonso L, Magar R. The Durability of OnabotulinumtoxinA for the Treatment of Chronic Migraine: CLARITY Pilot Study. Presented at American Academy of Neurology Annual Meeting, Philadelphia, PA. 2014.
Tzoulis C, Kent R, Robertson A, Maltman J, Purdy C, Magar R. The Retrospective Evaluation of the Dose of IncobotulinumtoxinA and OnabotulinumtoxinA for the Clinical Management of Cervical Dystonia and Blepharospasm: TRUDOSE Pilot Study. Presented at American Academy of Neurology Annual Meeting, Philadelphia, PA. 2014.
Blumenfeld A, Inocelda A, Cunanan C, Purdy C, Dalfonso L, Magar R. Long-term treatment of chronic migraine with onabotulinumtoxinA: CLARITY pilot study. Presented at the 33rd Annual Scientific Meeting of the American Pain Society, Tampa, FL. 2014.
2013
Gärtner M, Petzel M, Kublanck A, Eckert R, Schmidtke M, Purdy C, Magar R, Dalfonso L, Walters C. A Non-interventional Retrospective Evaluation of Resources Consumed During the Provision of Care for Overactive Bladder Syndrome (The REDUCE Study – Interim Analysis). Presented at the International Continence Society Annual Meeting, Barcelona, Spain. 2013.
Indig M, Purdy C, Magar R, Dalfonso L, Walters C, Nazir J. A Non-Interventional Retrospective Evaluation of Resources Consumed During the Provision of Care for Overactive Bladder Syndrome: German Perspective (The REDUCE Study). Presented at ISPOR 16th Annual European Congress, Dublin, Ireland. 2013.
2012
Wexner SD, Bernstein M, Purdy C, Magar R. A five-year Markov model evaluating the cost-utility of NASHA/DX for the treatment of fecal incontinence: A United States perspective. Presented at ISPOR 15th Annual European Congress, Berlin, DE. 2012.
2011
Yoelin S, Caulkins C, Magar R, Purdy C, Dalfonso L. Interim Analysis of A Non-Interventional Observational And Medical Records Review of Patient Outcomes With Bimatoprost Ophthalmic Solution 0.03% for the Treatment of Hypotrichosis of the Eyelashes. Presented at World Congress of Dermatology, Seoul, Korea. 2011.
2010
Henderson D, Purdy C, Magar RM, Hayward AH. The Potential Economic Benefits Provided By Combining Cisplatin with Src Inhibitor Kx1-004 for Cancer Regimens. Presented at ISPOR 15th Annual International Meeting, Atlanta, GA. 2010.
2009
Magar R, Purdy C, Hayward AH, Einarson TR, Burnett AK. Cost-effectiveness Analysis of Histamine Dihydrochloride + Low Dose Interleukin-2 Vs Standard of Care for Remission Maintenance for Acute Myeloid Leukemia Patients in their First Complete Remission: A UK Perspective. Presented at ISPOR 12th Annual European Meeting, Paris, France. 2009.
Purdy CH, Magar RS, Hayward A, Einarson TR. Comparison of Two Methods to Determine Costs for AML Patients in Remission Maintenance: Model Validation from a UK Perspective. Presented at ISPOR 12th Annual European Meeting, Paris, France. 2009.
Hayward AH, Purdy CH, Hargrave B, Voltz C, Magar R. AIDS Community Services of Western New York: A Comprehensive Model for HIV Care and Prevention. Presented at ISPE International Conference on Pharmacoepidemiology and Therapeutic Risk Management, Providence, RI. 2009.
2008
Hayward AH, Purdy CH, Magar R, Iskedjian MI. Incremental Cost Savings Associated with Bariatric Surgery in WNY. Presented at the 11th Annual ISPOR Meeting, Greece. November 2008.
Hayward AH, Purdy CH, Magar R, Iskedjian MI. The Impact of Bariatric Surgery on Psychological Parameters. Presented at DIA, Boston, June 2008.
Hayward AH, Purdy CH, et al. The Development of a Standardized Clinical Algorithmic Predictor of Weight Loss After Bariatric Surgery: Database Analysis Enables Empirical and Statistical Prediction of Threshold Weight Loss by End of Third Post-Operative Visit. Presented at the 11th Annual ISPOR Meeting, Toronto, May 2008.
2007
Magar RS, Fine PG, White RE. Expected Cost and Cost Considerations Associated with Opioid Rotation for Chronic Non-Cancer Pain: A Simulation Model. Presented at the 10th Annual ISPOR Meeting, Dublin, Ireland. 2007.
2000
Marchetti A, Magar R, Lau H. RSV Hospitalization Charges for Infants not Prophylaxed and Prophylaxed with Palivizumab. Presented at AAP Annual Meeting Critical Care, Emergency Medicine & Transport Medicine, Boston, MA. 2000.
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