AN ECOLOGICAL STUDY OF THE CORRELATION BETWEEN DIET AND TUMOR MORTALITY-RATES IN ITALY

Cancer is said to be due to nutrition in 35 cases out of 100, ranging from 10 to 70% by sites, Saturated fats show a positive relationship w ith cancer, while vitamins, vegetables and cereals show a negative rel ation with it, This work was aimed at studying the relationship betwee n nutrition and cancer in different Italian areas, Cancer mortality ra tes collected in 94 National Health units over the period 1980-82 have been correlated with the average food consumption of individuals regi stered in the same units, All the nutrient groups have shown evidence of a correlation between nutrient intake and mortality rates, Fats, an imal proteins and saturated fatty acids showed the strongest positive correlations; vegetable proteins, fibre, carbohydrates, oleic acid, vi tamins C and B1 gave negative correlations, Thus, it can be concluded that (a) this ecological analysis has confirmed previous hypotheses co ncerning the role of vegetables in cancer prevention and (b) the relat ion between nutrition and cancer mortality could be even stronger if a pplied to the whole population, since a 1-g increase in vegetable prot ein consumption would result in a reduction of 2.5 cases out of 100, a 1-g increase in fibre would result in a reduction of four cases out o f 100 and a 1-g increase in animal fat would result in an increase of one case out of 100.