[Evolution of breast cancer mortality in Spain].

A study is presented about the evolution of the breast cancer mortality in Spain between 1961 and 1980. This has been increasing strongly of several factors: 1) In actual increase of this disease, rising its adjusted death rates by age from 8/100,000 (1961) to 13/100,000 (1980) (increase = 62%); the truncated standardized rates between 35 and 64 years raised from 18/100,000 (1961) to 28/100,000 (1980): there is high correlation between both types of rates. 2) An increase of the female population at breast cancer risk (over 45 yr). A selective and significative rise of mortality from this cancer for the age groups under menopause, especially for the group 30-34 years (160%). The increase of female breast cancer mortality is statistically significant. It is necessary researching the causes of such increase.