A photo of Patrick Ryan.

Professor, UC Department of PediatricsUC Department of Environmental Health


Biography & Affiliation


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.

Research Interests

Environmental epidemiology; air pollution; personal monitors; greenspace; neurodevelopment; respiratory health

Academic Affiliation

Professor, UC Department of PediatricsUC Department of Environmental Health


Biostatistics and Epidemiology


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

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

BS: Xavier University, Cincinnati, OH, 2001.


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.