Published by Misasa Medical Center, Okayama University Medical School
Published by Misasa Medical Center, Okayama University Medical School

<Formerly known as>
岡大三朝分院研究報告 (63号-72号) 環境病態研報告 (57号-62号)
岡山大学温泉研究所報告 (5号-56号) 放射能泉研究所報告 (1号-4号)

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Morinaga, Hiroshi
Since, in Japan situated in the temperate zone, climatic change through the four seasons of a year is regular, it is expected that there the physiological reactions of the human body may vary regularly in accordance with the climatic change. In fact, we experience that the attacks of diseases and their conditions are in close connection with the changes of the seasons. The author investigated the effect of the seasons upon the human gastric acidity, by means of the coffein-test, in 580 cases with gastrointestinal disorders, at the Misasa Branch Hospital of Okayama University, Misasa Spa in Tottori Prefecture, in 1946~1946. Hyperacidity was verified in 194 (33%) of 580 cases, normacidity in 134 (23%), anacidity in 138 (24%) and hypacidity in 114 (20%). The percentage of hyperacidity increases in winter (41%), decreases in spring (32%) and in summer (28%), and increases again in autumn (34%). The cases of anacidity decrease in winter and spring, but increase in summer. In chi-square test, the season and the acidity of gastric juice were taken as factors of variation. The chi-square was computed with the result: Pr {X(3)=14.013<16.919} =5%, so it cannot be asserted that the seasonal changes effect the acidity of gastric juice. But if Comparison is made between summer and winter with respect to the anacidity-hypacidity vs. the hyperacidity, the author: obtains Pr {X(2)=6.06> 5.412} =2%. It is thus verified that the cases of hyperacidity predominate over those of anacidity-hypacidity in winter, while the relation is reverse in summer. As was mentioned above, the tendency is obvious that the acidity of gastric juice decreases in summer and increases in winter. It was found that there is a regular seasonal variation in gastric acidity.