1982 Volume 32 Issue 1 Pages 51-58
The methods generally used in the second step screening of mass survey for gastric cancer are the direct, routine x-ray examination and/or the endoscopic examination. In order to improve the accuracy and efficiency of close examination (the second step examination), the results with two methods of close examination and in the institutions where they were carried out were respectively compared each other in the point of the detection rates of gastric cancer. The receiving rates of close examinations were also compared between the x-ray and the endoscopy, and between our institution and the others respectively.
The results obtained from this study are as follows ;
1) A total number of subjects receiving the first screening was 79064 and 29.9% of them was required to receive the close examinations.
2) A number of subjects required to receive the endoscopic examination was 16134, showing eleven times more than the x-ray examination.
3) A receiving rate of the close examinations was 77.4% in our institution and 69.9% in the others.
4) In comparison of institution, a receiving rate of the endoscopy was 77.4% in ours and 61.1 % in the others. That of the x-ray was 76.7% in ours and 311.9% in the others.
5) Regarding a detection rate of gastric cancer, our institution showed 1.1% with each methods of the close examinations, but the others revealed 0.3% with the x-ray and 0.7% with the endoscopy.
6) A ratio of early stage cancer to the detected gastric cancer was 60.2% in our institution, but 40.5% in the others.
From these results, the followings are concluded ; Compared with the other institutions, our institution obtained excellent results in the detection rates of gastric cancer as well as the receiving rate of close examinations. For the reasons, these are considered that, at first, the x-ray examination in our institution was less used than most of others ; second, most of the persons indicated to receive the endoscopic examination were examined with the x-ray instead of the endoscopy in the other institution.
