1. We distributed survey schedules to all the hospitals and medical offices in Miyagi Prefecture, Japan which has about 1, 663, 000 population and collected reports on all the cancer patients seen or treated during 1951. At the same time, we studied at the cases that cancer is recorded as cause of death out of the copies of the death notifications kept in all the Health Centers in the prefecture. The results obtained by the above mentioned two kinds of survey were enumerated.
2. The case number reported from hospitals and medical offices was 2, 804 in total. However, since one patient is likely reported from two or more of hospitals and/or medical offices, the exact number was 1, 964. Among the patients, the number of residents of Miyagi Prefecture is 1, 515. As there are no any other hospitals equal to or larger than the Tohoku University Hospital in scale in adjacent prefectures, many persons visit this hospital from adjacent prefectures. It is presumed that few residents of Miyagi Prefecture ask to have examination and treatment 'to hospitals in other prefectures.
The number of such cases that “cancer” was recorded in any column of cause of death in the death certificates was 1, 254 (male 652, female 602). Among these cases, 507 were reported from hospitals and medical offices. In 1951, out of residents of Miyagi Prefecture, the exact number of known cancer cases was 2, 262 (male 1, 061, female 1, 201). Among them, 1, 350 presented first subjective symptom in the study year.
3. An incidence rate of cancer patients who felt their first subjective symptom in 1951 was 81 (male 83, female 79) per 100, 000 population. A prevalence rate of all the cancer cases, cancer deaths and cancer cured cases that physicians dealt with for some reasons in the study year was 136 (male 128, female 144) per 100, 000 population. A mortality rate of the cases that cancer were recorded in any column of cause of death in the death certificates was 75 (male 79, female 72) per 100, 000 population.
4. Viewing incidence cases by site, in male stomach (55% of total male incidence cases), liver and biliary passages (14%), and esophagus (7%) show large number in frequency. Leukemias and aleukemias, rectum, lymphomas, intestine, and lung succeed the former, but they have a small proportion. In female, stomach (32% of total female incidence cases), uterus (21%), liver and biliary passages (11%), and breast (7%), esophagus, rectum, and sarcomas succeed the former. Skirt and prostate cancer occurs markedly in small frequency.
5. The 12-month survival rate of newly diagnosed patients in 1951 is male, 43 per cent and female, 61 per cent. In stomach cancer male, 41 per cent and female, 43 per cent after twelve months and male, 53 per cent and female, 57 per cent after six months. Comparing a survival rate of a group of patients whose stomach and uterus cancer was operated to that of non-operated group of patients, it was recognized that a survival rate of the former is higher than that of the latter.
This work was carried out by a Grant from the Foundation for Scientific Research of the Ministry of Education. M. Segi
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