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 Featured Article 2007 -- A new study, "DDT and Breast Cancer in Young Women: New Data on the Significance of Age at Exposure," was published in Environmental Health Perspectives on October 1, 2007. In the first study to examine how exposure in early life affects later life risk for breast cancer, researchers Barbara Cohn, PhD, et al, found that exposure to DDT before mid-adolescence may increase breast cancer risk up to 5-fold. Many U.S. women heavily exposed to DDT in childhood have not yet reached 50 years of age, therefore the public health significance of DDT exposure in early life may be large. High levels of serum DDT predicted a statistically significant 5-fold increased risk of breast cancer among women who were born after 1931. These women were not occupationally exposed and were under 14 years of age in 1945 when DDT came into widespread use, and mostly under 20 years as DDT use peaked. Women who were not exposed to DDT before 14 years of age showed no association between DDT and breast cancer. Previous studies of DDT and breast cancer assessed exposure later in life, after the time that animal studies indicate the window of maximum vulnerability may have passed. To find out more, visit the following links to Environmental Health Perspectives, L.A. Times, Living on Earth, Washington Post and Environmental Health News.
NEW STUDY SUGGESTS THAT MATERNAL EXPOSURE TO PARASITIC INFECTION MAY INCREASE RISK OF SCHIZOPHRENIA IN OFFSPRING
NEW YORK, May 16, 2005 -- A study published last month in the American Journal of Psychiatry suggests an association between maternal exposure to toxoplasmosis and increased risk for developing schizophrenia in adult children. The study, which evaluated archived blood samples from pregnant women who participated in a large birth cohort called the Child Health and Development Study (CHDS) from 1959-1967, was conducted by researchers at the New York State Psychiatric Institute and the Department of Epidemiology at the Mailman School of Public Health at Columbia University, in collaboration with the Kaiser Permanente Medical Care Plan, Northern California Region and The Child Health and Development Studies, Public Health Institute.
NEW STUDY INDICATES THAT EXPOSURE TO INFLUENZA DURING PREGNANCY MAY INCREASE THE RISK OF SCHIZOPHRENIA IN OFFSPRING YEARS LATER
NEW YORK, NY (August 2, 2004)- A new study published today in the JAMA publication, Archives of General Psychiatry, indicates that prenatal exposure to influenza may increase the risk for development of schizophrenia years later. The study, which evaluated archived sera from pregnant women who participated in a large birth cohort called the Child Health and Development Study (CHDS) from 1959-1966, was conducted by researchers at the New York State Psychiatric Institute and the Mailman School of Public Health at Columbia University, in collaboration with the Kaiser Permanente Medical Care Plan, Northern California Region and the Child Health and Development Studies, Public Health Institute, Berkeley, California.
NEW STUDY LINKS EXPOSURE TO THE PESTICIDE, DDT, BEFORE BIRTH, TO ABILITY TO BECOME PREGNANT
Work by Dr. Barbara Cohn and her colleagues, published in The Lancet on 28 June 2003 [1], reveals an unexpected association between DDT and delays in pregnancy in the daughters of exposed women. This is the first scientific report ever of a link between DDT and reproductive outcome in women exposed to the contaminant in the womb. The analysis indicates that the association is unlikely to be a result of chance. |
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