We cannot deny that, with the recent rise in the recovery rate of cancers, the significance of mortality statistics in studying the geographical distribution of cancer has been reduced, but seeing that in many part of the world, however, no survey on cancer morbidity has been carried out to date, we believe, the significance has not yet been lost altogether. We applied to the central statis tical administrations of many countries and have been kindly supplied with data on the mortality for cancer. In this report, we will write on the ageadjusted death rates for cancer for the two years of 1954 and 1955 and on the geographical correlation among them. Method of StudyWe have been furnished with the statistical data on the population and the mortality for cancers in some specified sites by the central statistical adminis trations of 23 countries and calculated the age-adjusted death rates. The countries from which we were furnished the data were as follows :

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To clarify the differences in characteristics between participants and non-participants in the screening program for stomach cancer, life-style and medical histories were compared among 20,169 subjects who lived in an urban area (Sendai) and a rural area (Wakuya and Tajiri) in Miyagi Prefecture, Japan. All subjects were classified into three groups according to the frequency of participation in the screening program during the last 5 years ; i.e., frequent participating group (FPG) for 4 or 5 times, reference group (RG) for 1-3 times and non-participating group (NPG) for 0 times. Subjects in the FPG consumed more milk and green-yellow vegetable whereas those in the NPG consumed less these foods. The age-adjusted proportions of present smokers were higher in the NPG but lower in the FPG significantly. The proportions of subjects who had parental histories of all cancers and stomach cancer and past

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