Patrick H. Ryan, PhD, MS

Academic Affiliations

Professor, UC Department of Pediatrics

UC Department of Environmental Health

Phone 513-803-4704


Epidemiology; air pollution; exposure assessment
Dr. Ryan’s research program focuses on the role of indoor and outdoor environmental toxicants on pediatric health, with specific focus on the impact of air pollutants on respiratory and neurobehavioral development. In addition to the development and application of spatial models of air pollution to study pediatric allergic disease, respiratory development, and neurobehavioral outcomes, his research includes the use of personal air monitors and health sensors in epidemiologic studies. Additional research interests include the impact of naturally occurring elongated mineral fibers on respiratory and autoimmune disease in Libby, MT and other locations in the western US.

PhD: University of Cincinnati, Cincinnati, OH, 2007.

MS: University of Cincinnati, Cincinnati, OH, 2004.

BS: Xavier University, Cincinnati, OH, 2001.

View PubMed Publications

Brokamp C, Wolfe C, Lingren T, Harley J, Ryan P. Decentralized and Reproducible Geocoding and Characterization of Community and Environmental Exposures for Multi-Site Studies. Journal of the American Medical Informatics Association. 2018;25(3):309-314.

Wolfe C, Buck B, Miller A, Lockey J, Weis C, Weissman D, Jonesi A, Ryan P. Exposure to naturally occurring mineral fibers due to off-road vehicle use: A review. International Journal of Hygiene and Environmental Health. 2017;220(8):1230-1241.

Brokamp C, Beck AF, Muglia L, Ryan P. Combined sewer overflow events and childhood emergency department visits: A case-crossover study. Science of the Total Environment. 2017;607-608:1180-1187.

Ryan PH, Rice CH, Lockey JE, Black B, Burkle J, Hilbert TJ, Levin L, Brokamp C, McKay R, Wolfe C, LeMasters GK. Childhood Exposure to Libby Amphibole and Respiratory Health in Young Adults. Environmental Research. 2017;158:470-479.

Yaghyjan L, Arao R, Brokamp C, O’Meara E, Sprague B, Ghita G, Ryan P. Association of Air Pollution with Mammographic Breast Density in the Breast Cancer Surveillance Consortium. Breast Cancer Research. 2017;19:36.

Brokamp C, Jandarov R, Rao MB, LeMasters GK, Ryan PH. Exposure assessment models for elemental components of particulate matter in an urban environment: A comparison of regression and random forest approaches. Atmospheric Environment. 2017;151:1-11.

Kannan JA, Brokamp C, Bernstein DI, LeMasters GK, Khurana Hershey GJ, Villareal MS, Lockey JE, Ryan PH. Parental Snoring and Environmental Pollutants, But Not Aeroallergen Sensitization, Are Associated With Childhood Snoring In A Birth Cohort. Pediatric Allergy, Immunology, and Pulmonology. 2017;30(1):31-38.

Nanda M, LeMasters G, Levin L, Rothenberg M, Assa’ad A, Newman N, Bernstein D, Hershey GKK, Lockey J, Ryan PH. Allergic Diseases and Internalizing Behaviors in Early Childhood. Pediatrics. 2016;137(1):1-10.

Ryan PH, Son SY, Wolfe C, Lockey J, Brokamp C, LeMasters GK. A Field Application of a Personal Sensor for Ultrafine Particle Exposure in Children. Science of the Total Environment. 2015;508:366-373.

Ryan PH, LeMasters GK, Burkle J, Lockey JE, Black B, Rice C. Childhood Exposure to Libby Amphibole During Outdoor Activities. Journal of Exposure Science and Environmental Epidemiology. 2015;25(1):4-11.

Neurobehavioral and Neuroimaging Effects of Traffic Exposure in Children. Principal Investigator. National Institute of Environmental Health Sciences. Jul 2012-Mar 2019. R01ES019890.

Assessing Personal Exposure to Ultrafine PM Number and Respiratory Health. Principal Investigator. National Institute of Environmental Health Sciences. Mar 2017–Feb 2020. R33ES024713.

Children’s Respiratory Research and Environment Workgroup. Co-Investigator. National Institutes of Health. Sep 2016–Aug 2023. UG3OD023282.

Unraveling ancestry and environmental exposure interactions in childhood asthma. Co-Investigator. National Heart, Lung, and Blood Institute. Apr 2016–Mar 2021. R01HL132344.

Role of measured and observed mold in the development of children's asthma (HUD). Co-Investigator. U.S. Department of Housing and Urban Development. Feb 2018–Jan 2021.

WE Engage: Data and Stories to Improve Science Literacy and Community Health. Co-Investigator. National Institute of General Medical Sciences. Sep 2018–Jul 2023. R25GM129808.

Administrative supplement to potential Inhaled dose of particulates, biking and cardiovascular indicators. Co-Investigator. National Institute of Environmental Health Sciences. Sep 2018–Feb 2019. R33ES024734.