[A study on the management of accuracy by the close examination in the gastric mass survey].

To reduce mortality rate of gastric cancer by the gastric mass survey, the effectiveness of gastro-endoscopy was compared with the direct fluoro-radiography as the close examination. By means of the indirect fluoro-radiography, the gastric mass surveys was performed for 695, 703 subjects in the period of 6 years starting from 1985 April to 1991 March in the Kagoshima Prefecture. 327 gastric cancers (0.66%) out of 49,545 subjects were found by the direct fluoro-radiography as the close examination, 261 gastric cancers (0.98%) out of 26,642 subjects were found by the gastro-endoscopy as the close examination. Furthermore the gastro-endoscopy (detection rate: 2.5%) showed higher efficiency and effectiveness than the direct fluoro-radiography (detection rate: 1.3%) on the aged group. Therefore further improvement of the accuracy of the gastric mass survey in the aged group can be achieved by the gastro-endoscopy as the close examination. As the accuracy of the gastric mass survey was different from the institution to the institution and from the area to the area, particularly in the direct fluoro-radiography, but not in the gastro-endoscopy, depending on the training group of area, the later should be performed for the subjects for whom the former had been done at first. In addition to lectures, demonstration of practical techniques of the examinations should be displayed for the improvement of the gastric mass survey. The necessity of the gastro-endoscopy for the final diagnosis of gastric cancer should be understood by the subjects who was examined and person engaged in the gastric mass survey by the enlightment movement.