CTS researcher Dr. Leslie Bernstein is among the most accomplished researchers working in cancer epidemiology today.  Among her many research achievements; she was instrumental in identifying physical activity as means for reducing breast cancer risk.  She is involved in a host of projects, including those based in the CTS, to unravel the links between hormone exposures, obesity, physical activity and cancer. Read More of the Story »

The California Teachers Study (CTS) is a prospective study of 133,479 current and former public school teachers or administrators who participate in the California State Teachers Retirement System (STRS). The initiation of the cohort was supported by the State of California through revenues generated by cigarette taxes for the purpose of supporting breast cancer research. The CTS was developed by a consortium of investigators from the California Department of Health Services, the Cancer Prevention Institute of California, the University of California, Irvine, and the University of Southern California.

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