Ryan Demmer, PhD

  • Adjunct Associate Professor, Epidemiology
Profile Headshot


Dr. Demmer has a general research interest in chronic disease risk factor epidemiology with specific focus on the interplay between the human microbiome and immuno-inflammatory phenotype as risk factors for cardiometabolic diseases. Dr. Demmer is involved in several collaborative projects domestically and internationally and is currently PI of an NIH funded cohort study: The Oral Infections Glucose Intolerance and Insulin Resistance Study (ORIGINS). The scientific aims of ORIGINS are to study the interplay between the subgingival microbiome and early risk for the development of type 2 diabetes. Dr. Demmer is co-PI of a project that is cataloguing Bloomberg era public health policy in New York City and evaluating the influence of the policy environment on chronic disease mortality and hospitalization rates. He also serves as co-investigator on several additional projects investigating novel risk factors and prediction models for cardiovascular disease, periodontal disease and congestive heart failure. Dr. Demmer teaches courses regarding applied epidemiological research methods and is co-director of the Epidemiology and Population Health Summer Institute at Columbia University (EPIC).

Academic Appointments

  • Adjunct Associate Professor, Epidemiology

Administrative Titles

  • Co-Director, Epidemiology and Population Health Summer Institute at Columbia University

Credentials & Experience

Education & Training

  • MPH, 2000 University of Minnesota
  • PhD, 2005 University of Minnesota

Honors & Awards

Calderone Research Award, 2010

Mailman School of Public Health, Asst. Professor Teaching Award


Research Interests

  • Biostatistical Methods
  • Chronic disease
  • Environmental Health

Selected Publications

Demmer RT, Jacobs DR, Singh R, Zuk A, Rosenbaum M, Papapanou PN, Desvarieux M. Periodontal Bacteria and Prediabetes Prevalence: The Oral Infections, Glucose Intolerance and Insulin Resistance Study (ORIGINS). Journal Dental Research. 2015. Epub ahead of print, June 16, 2015. PMID: 26082387.

Demmer RT, Zuk A, Rosenbaum M. Diabetes Prevalence among Youth. JAMA. 2014 Sep 17;312(11):1153. PMID: 25226483.

DeBoer MD, Scharf RJ, Demmer RT. Sugar-Sweetened Beverages and Weight Gain in 2- to 5- Year-Old Children. Pediatrics. 2013 Sep;132(3):413-20. PMID: 23918897.

Arora N, Papapanou PN, Rosenbaum M, Jacobs DR, Desvarieux M, Demmer RT. Periodontal Infection, Impaired Fasting Glucose and Impaired Glucose Tolerance: Results from The Continuous National Health and Nutrition Examination Survey 2009-2010. Journal of Clinical Periodontology. 2014. April 8. PMID: 24708451.

Demmer RT, Jacobs DR, Desvarieux M. Periodontal Disease and Incident Type 2 Diabetes Mellitus: Results from the First National Health and Nutrition Examination Survey and its Epidemiologic Follow-up Study. Diabetes Care 31(7) 1373-9 2008

Demmer RT, Trinquart L, Zuk A, Fu BC, Blomkvist J, Michalowicz BS, Ravaud P, Desvarieux M. The Influence of Anti-Infective Periodontal Treatment on C-Reactive Protein: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. PLOS-One. 2013 Oct;8(10). PMID: 24155956. PMCID: PMC3796504.

Demmer RT, Zuk A, Rosenbaum M, Desvarieux M. Prevalence of Diagnosed and Undiagnosed Type 2 Diabetes Mellitus Among US Adolescents: Results from The National Health and Nutrition Examination Survey 1999 - 2010. American Journal of Epidemiology. 2013 Oct 1;178(7):1106-13. PMID: 23887044.

Lanier GM, Orlanes K, Hayashi Y, Murphy J, Flannery M, Te-Frey R, Uriel N, Yuzefpolskaya M, Mancini DM, Naka Y, Takayama H, Jorde UP, Demmer RT, Colombo PC. Validity and Reliability of a Novel Slow Cuff-deflation System for Non-invasive Blood Pressure Monitoring in Patients with Continuous-Flow Left Ventricular Assist Device. Circulation-Heart Failure. 2013 Sep 1;6(5):1005-12. PMID: 23811966.

Demmer RT, Desvarieux M, Holtfreter B, Jacobs DR, Wallaschofski H, Nauck M, Volzke H, Kocher T. Periodontal Status and Hemoglobin A1C Change: Longitudinal Results from the Study of Health in Pomerania (SHIP). Diabetes Care. 2010 May;33(5):1037-43. PMID: 20185742.

Demmer RT, Molitor JA, Jacobs DR, Michalowicz BS. Periodontal Disease, Tooth Loss and Incident Rheumatoid Arthritis: Results from the First National Health and Nutrition Examination Survey and its Epidemiologic Follow-up Study. Journal of Clinical Periodontology. 2011 Nov;38(11):998-1006. PMID: 22092471. PMCID: PMC3403745.