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Margaret Rita Karagas, PhD

Chair and Professor of Epidemiology
Professor of Community and Family Medicine
James W. Squires Professor

Additional Titles/Positions/Affiliations:
Director, Children's Environmental Health and Disease Prevention Research Center and Center for Molecular Epidemiology

Community and Family Medicine

University of Washington, PhD 1990

Norris Cotton Cancer Center
Quantitative Biomedical Sciences


Contact Information:

Department of Epidemiology
1 Medical Center Drive
7927 Rubin Building
Lebanon NH 03756

Office: 863 Rubin Bldg Lebanon, NH
Phone: 603-653-9010
Fax: 603-653-9093

Assistant: Evan Vickers
Asst. Phone: 603-650-1918
Asst. Email:

Professional Interests:

Professor Karagas' research encompasses several epidemiological studies focusing on the etiology and prevention of human cancers over the lifecourse, as well as adverse pregnancy and children's health outcomes. These include investigations to determine incidence rates of basal cell and squamous cell skin cancer for a geographically defined US population, and to assess the extent of any increase over the past 20 years. Another aspect of this research is a case-control study of these malignancies to identify risks associated with emerging exposures such as indoor tanning, ingestion of arsenic-containing drinking water and foods, immunosuppressive therapies and other factors. This research has been extended to bladder cancer. One of her current initiatives involves establishing a cohort of pregnant women in New Hampshire to assess the potential impact of arsenic and other exposures on risk of maternal and child health. Her ongoing work further includes studies of melanoma in women and collaborative investigations of exposure biomarkers, individual susceptibility, and biological response to environmental agents. Professor Karagas is one of the Principal Investigators of a NCI-funded cross-disciplinary postdoctoral training grant, serves as a mentor for early career investigators and participates in a variety of courses at the undergraduate and graduate level.

Selected Publications:


Racial and geographic variation in effects of maternal education and neighborhood-level measures of socioeconomic status on gestational age at birth: Findings from the ECHO cohorts.
Dunlop AL, Essalmi AG, Alvalos L, Breton C, Camargo CA, Cowell WJ, Dabelea D, Dager SR, Duarte C, Elliott A, Fichorova R, Gern J, Hedderson MM, Thepaksorn EH, Huddleston K, Karagas MR, Kleinman K, Leve L, Li X, Li Y, Litonjua A, Ludena-Rodriguez Y, Madan JC, Nino JM, McEvoy C, O'Connor TG, Padula AM, Paneth N, Perera F, Sathyanarayana S, Schmidt RJ, Schultz RT, Snowden J, Stanford JB, Trasande L, Volk HE, Wheaton W, Wright RJ, McGrath M, program collaborators for Environmental Influences on Child Health Outcomes.
PLoS One. 2021;16(1):e0245064. doi: 10.1371/journal.pone.0245064. Epub 2021 Jan 8.
PMID: 33418560

Prediction of an outcome using NETwork Clusters (NET-C).
Lee JW, Zhou J, Moen EL, Punshon T, Hoen AG, Romano ME, Karagas MR, Gui J
Comput Biol Chem. 2020 Dec 8;90:107425. doi: 10.1016/j.compbiolchem.2020.107425. Epub 2020 Dec 8.
PMID: 33360198

Arsenic exposure in relation to apple consumption among infants in the New Hampshire Birth Cohort Study.
Signes-Pastor AJ, Punshon T, Cottingham KL, Jackson BP, Sayarath V, Gilbert-Diamond D, Korrick S, Karagas MR
Expo Health. 2020 Dec;12(4):561-567. doi: 10.1007/s12403-020-00356-7. Epub 2020 Apr 8.
PMID: 33195875

Periconceptional and prenatal exposure to metal mixtures in relation to behavioral development at 3 years of age.
Doherty BT, Romano ME, Gui J, Punshon T, Jackson BP, Karagas MR, Korrick SA
Environ Epidemiol. 2020 Aug;4(4):e0106. doi: 10.1097/EE9.0000000000000106. Epub 2020 Jul 6.
PMID: 33154986

Prenatal and postnatal mercury exposure and blood pressure in childhood.
Farzan SF, Howe CG, Chen Y, Gilbert-Diamond D, Korrick S, Jackson BP, Weinstein AR, Karagas MR
Environ Int. 2021 Jan;146:106201. doi: 10.1016/j.envint.2020.106201. Epub 2020 Oct 28.
PMID: 33129000

Assessment of Multipollutant Exposures During Pregnancy Using Silicone Wristbands.
Doherty BT, Pearce JL, Anderson KA, Karagas MR, Romano ME
Front Public Health. 2020;8:547239. doi: 10.3389/fpubh.2020.547239. Epub 2020 Sep 29.
PMID: 33117768

Toenails as a biomarker of exposure to arsenic: A review.
Signes-Pastor AJ, Gutierrez-Gonzalez E, Garcia-Villarino M, Rodriguez-Cabrera FD, Lopez-Moreno JJ, Varea-Jimenez E, Pastor-Barriuso R, Pollan M, Navas-Acien A, Perez-Gomez B, Karagas MR
Environ Res. 2020 Oct 16;:110286. doi: 10.1016/j.envres.2020.110286. Epub 2020 Oct 16.
PMID: 33075355

Private well water testing promotion in pediatric preventive care: A randomized intervention study.
Murray CJ, Olson AL, Palmer EL, Yang Q, Amos CI, Johnson DJ, Karagas MR
Prev Med Rep. 2020 Dec;20:101209. doi: 10.1016/j.pmedr.2020.101209. Epub 2020 Sep 12.
PMID: 33072497

Identification of microbial interaction network: zero-inflated latent Ising model based approach.
Zhou J, Viles WD, Lu B, Li Z, Madan JC, Karagas MR, Gui J, Hoen AG
BioData Min. 2020;13:16. doi: 10.1186/s13040-020-00226-7. Epub 2020 Oct 7.
PMID: 33042226

Risk of keratinocyte carcinomas with vitamin D and calcium supplementation: a secondary analysis of a randomized clinical trial.
Passarelli MN, Karagas MR, Mott LA, Rees JR, Barry EL, Baron JA
Am J Clin Nutr. 2020 Dec 10;112(6):1532-1539. doi: 10.1093/ajcn/nqaa267.
PMID: 33022713

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