Figure 1
From: Estrogen receptor positive breast cancers and their association with environmental factors
Temporal trend between 1992 and 2001 for ER+ and ER- breast cancer rates for twelve cancer registries in the U.S. (San Francisco- Oakland, Connecticut, Atlanta, Rural Georgia, Hawaii, Iowa, Detroit, New Mexico, Utah, Seattle, and Los Angeles). A time series analysis suggest there was a strong time effect for ER+ cancers (F1,96 = 168.46; p < 0.001), but not for ER- cancers (F1,96 = 0.92; p < 0.340). All data were obtained from the National Cancer Institute SEER program.