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




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

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

BS: Xavier University, Cincinnati, OH, 2001.


Effect of greenness on asthma in children: A systematic review. Hartley, K; Ryan, P; Brokamp, C; Gillespie, GL. Public Health Nursing. 2020; 37:453-460.

Atopic dermatitis independently increases sensitization above parental atopy: The MPAACH study. Kroner, JW; Kyzy, AB; Burkle, JW; Martin, LJ; LeMasters, GK; Bernstein, DI; Lockey, JE; Ryan, P; Hershey, GK K; Myers, JM B. Journal of Allergy and Clinical Immunology. 2020; 145:1464-1466.

Expression quantitative trait locus fine mapping of the 17q12–21 asthma locus in African American children: a genetic association and gene expression study. Ober, C; McKennan, CG; Magnaye, KM; Altman, MC; Washington, C; Stanhope, C; Naughton, KA; Rosasco, MG; Bacharier, LB; Billheimer, D; et al. The Lancet Respiratory Medicine. 2020; 8:482-492.

HEPA filtration improves asthma control in children exposed to traffic-related airborne particles. James, C; Bernstein, DI; Cox, J; Ryan, P; Wolfe, C; Jandarov, R; Newman, N; Indugula, R; Reponen, T. Indoor Air: international journal of indoor air quality and climate. 2020; 30:235-243.

Reduced gray matter volume and cortical thickness associated with traffic-related air pollution in a longitudinally studied pediatric cohort. Beckwith, T; Cecil, K; Altaye, M; Severs, R; Wolfe, C; Percy, Z; Maloney, T; Yolton, K; LeMasters, G; Brunst, K; et al. PLoS ONE. 2020; 15:e0228092-e0228092.

A comparison of blood and toenails as biomarkers of children's exposure to lead and their correlation with cognitive function. Dantzer, J; Ryan, P; Yolton, K; Parsons, PJ; Palmer, CD; Cecil, K; Unrine, JM. Science of the Total Environment. 2020; 700:134519-134519.

The Children's Respiratory and Environmental Workgroup (CREW) birth cohort consortium: Design, methods, and study population. Gern, JE; Jackson, DJ; Lemanske, RF; Seroogy, CM; Tachinardi, U; Craven, M; Hwang, SY; Hamilton, CM; Huggins, W; O'Connor, GT; et al. Respiratory Research. 2019; 20.

Pediatric psychiatric emergency department utilization and fine particulate matter: A case-crossover study. Brokamp, C; Strawn, JR; Beck, AF; Ryan, P. Environmental Health Perspectives. 2019; 127:97006-097006.

Myo-inositol mediates the effects of traffic-related air pollution on generalized anxiety symptoms at age 12 years. Brunst, KJ; Ryan, PH; Altaye, M; Yolton, K; Maloney, T; Beckwith, T; LeMasters, G; Cecil, KM. Environmental Research. 2019; 175:71-78.

Combining sensor-based measurement and modeling of PM2.5 and black carbon in assessing exposure to indoor aerosols. Cox, J; Cho, SH; Ryan, P; Isiugo, K; Ross, J; Chillrud, S; Zhu, Z; Jandarov, R; Grinshpun, SA; Reponen, T. Aerosol Science and Technology. 2019; 53:817-829.