Mary Ann Chiasson

Mary Ann Chiasson

Mary Ann Chiasson

Professor of Clinical
Epidemiology (in Medicine)


40 Worth Street, 5th floor
New York NY 10013
Website address: Email:


Dr. Mary Ann Chiasson's research focuses on the epidemiology of HIV, particularly risk factors for sexual transmission; women's reproductive health; and early childhood obesity. Her current HIV-related research focuses on the relationship between the Internet and high risk sexual behavior among men who have sex with men and she directs the online video prevention project, HIV Is Still A Big Deal. She has co-directed the HIV/AIDS Epidemiology course at the Mailman School since 1989. Dr. Chiasson served in various capacities at the New York City Department of Health from 1986 through 1999, including nine years as an assistant commissioner of health with scientific and administrative responsibility for AIDS Surveillance, HIV/AIDS Research, and Vital Statistics and Epidemiology. In 1999 Dr. Chiasson was appointed vice president for research and evaluation at Public Health Solutions (PHS), a large non-profit organization that provides health-related services, conducts demonstration and research programs, and offers management services in order to improve community health and strengthen health policy.



DrPH, 1988, Columbia University
MPH, 1985, Columbia University
MS, 1978, New York University
BA, 1972, Bennington College

Other Affiliations

Fellow, New York Academy of Medicine
Member, Hermann Biggs Society 2002-2004

Areas of Expertise

Longitudinal Studies, Research Design and Methods, Infant Mortality, Underserved Populations, Weight Control, HIV/AIDS, Sexually Transmitted Infections, Infectious Disease, Family Planning, Reproductive Health, Sex Education and Safe Sex

Select Urban Health Activities

CHAIN Study, Chairman of the Technical Review Team: The CHAIN study appraises the system of care in New York City from the perspective of people living with HIV and AIDS. CHAIN has evolved into one of the most comprehensive client-based HIV prospective cohort studies launched by any metropolitan area in the US.
Obesity in Children Participating in the Public Health Solutions New York City Neighborhood WIC Program: The Public Health Solutions Research and Evaluation Unit has conducted two surveys to determine the prevalence of obesity and associated risk factors among children 2-4 years old enrolled in this WIC program which serves more than 55,000 women, infants, and children each year. The findings from these surveys are being used to age-appropriate interventions.
Health literacy, cervical cancer screening, and access to care among immigrant Latina women in New York City: This is a project exploring links between health literacy and cervical cancer screening in Latinas age 40 and over of varying nationalities in New York City.

Select Publications

Rosenberg T, Garbers S, Chavkin W, Chiasson MA Prepregnancy weight and adverse perinatal outcomes in an ethnically diverse population Obstetrics & Gynecology 102 1022-1027 2003
Nelson J, Chiasson MA, Ford V Childhood obesity in a New York City WIC population Am J Public Health 94 458-462 2004
Scheinmann R, Chiasson MA, Hartel D, Rosenberg TJ Evaluating a bilingual video to improve infant feeding knowledge and behavior among immigrant Latina mothers J Community Health 35 464-470 2010
Messeri P, Lee G, Abramson D, Aidala A, Chiasson MA, Jessop D Antiretroviral therapy and declining AIDS mortality in New York City Medical Care 41 512-521 2003
Garbers S, Correa N, Tobier N, Blust S, Chiasson MA Association between symptoms of depression and contraceptive method choices among low-income women at urban reproductive health centers Matern Child Health J 14 [Epub 2008 Dec 9] 102-109 2010
Garbers S, Uribelarrhea M, Foti H, Jessop D, Chiasson MA Barriers to breast cancer screening for low-income Mexican and Dominican women in New York City Journal of Urban Health 80 81-91 2003
Lipkin HS, Duzyj C, Rosenberg TJ, Funai EF, Chavkin W, Chiasson MA Disparities in Cesarean delivery rates and associated adverse neonatal outcomes in New York City hospitals Obstet Gynecol 113 1239-1247 2009
Brown-Peterside P, Ren L, Chiasson MA, Koblin B Double trouble: Violent and non-violent traumas among women at sexual risk of HIV infection Women & Health 36 51-64 2002
Chiasson MA, Hirshfield S, Remien RH, Humberstone M, Wong T, Wolitski RJ A comparison of online and offline sexual risk in men who have sex with men: An event-based online survey. J Acquir Immune Defic Syndr 44 235-243 2007
Fordyce E, Wang Z, Kahn A, Gallagher B, Merlos I, Ly S, Schymura M, Chiasson MA Risk of cancer among women with AIDS in New York City AIDS Public Policy 15 95-104 2000
Lehner T, Chiasson MA Seroprevalence of human immunodeficiency virus type 1 and sexual behaviors in bisexual African-American and Hispanic men visiting a sexually transmitted disease clinic in New York City American Journal of Epidemiology 147 269-272 1998
Chiasson MA, Hirshfield S, Humberstone M, DiFilippi J, Koblin BA, Remien RH Increased high risk sexual behavior after September 11 in men who have sex with men: Arch Sex Behav 34 527-535 2005
Hirshfield S, Wolitski RJ, Chiasson MA, Remien RH, Humberstone M, Wong T Screening for depressive symptoms in an online sample of men who have sex with men AIDS Care 20 904-910 2008
Shalev N, Olender SA, Chiasson MA Targeted anal cancer screening in HIV-infected patients: prevalence of screening indicators AIDS 23 1613-1615 2009
Conley L, Ellerbrock T, Bush T, Chiasson MA, Sawo D, Wright T HIV-1 infection and risk of vulvovaginal and perianal condylomata acuminata and intraepithelial neoplasia:a prospective cohort study Lancet 359 108-113 2002
Fordyce E, Singh T, Vazquez F, McFarland J, Thomas P, Forlenza S, Chiasson MA Evolution of an urban epidemic: The first 100,000 AIDS cases in New York City Population Research and Policy Review 18 523-544 1999
Chiasson MA, Berenson L, Li W, Schwartz S, Singh T, Forlenza S, Mojica B, Hamberg M Declining HIV/AIDS mortality in New York City JAIDS 21 59-64 1999
Chiasson MA, Shuchat Shaw F, Humberstone M, Hirshfield S, Hartel D Increased HIV disclosure three months after an online video intervention for men who have sex with men (MSM) AIDS Care 21 1081-1089 2009
Margolis AD, Joseph H, Belcher L, Hirshfield S, Chiasson MA 'Never testing for HIV’ among men who have sex with men recruited from a sexual networking website, United States AIDS Behav Jan 29 [Epub ahead of print] PMID:21279431 2011

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