Nearly a decade ago, women in Long Island began to worry about their high rates of breast cancer. So they advocated and lobbied and pushed until a public law was passed that allowed for the creation of the Long Island Breast Cancer Project. Funded by both the National Cancer Institute and the National Institute of Environmental Health Sciences, great data has emerged from this project -- like the data linking breast cancer and household pesticides.

Although much research has linked cancer with pesticides in work and industrial settings, few studies have investigated what these chemicals can do in households -- until now, thanks to research conducted as part of The Long Island Breast Cancer Project.

Published online in the December 13 American Journal of Epidemiology, researchers found an association between lifetime residential pesticide use and breast cancer risk in a sample of 1,508 Long Island women diagnosed with breast cancer between 1996 and 1997. These women were compared to 1,556 random controls. All women were asked to self-report their pesticide exposure and to offer blood samples for the study of organochlorine compound levels -- found in lawn and garden products.

As expected, researchers found an increased breast cancer risk for women whose blood samples showed the highest levels of organochlorine compounds. They also found it hard to find women who did not use lawn and garden pesticides to some degree.

Use of household pesticides has infiltrated our society, says researcher Susan Teitelbaum, assistant professor in the department of community medicine at Mount Sinai School of Medicine in New York, who reports she is happy to see a movement toward use of alternative methods, like integrated pest management.

Teitelbaum has just one recommendation as result of this study. It's quite simple really -- stop using pesticides.