CHOLELITHIASIS OBSERVED IN A MASS SURVEY OF BOTH STOMACH AND GALL BLADDER

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A second mass examination of both stomach and gall bladder was carried out on a single occupational group three years after initial examination. When cholelithiais had been suspected, an intensive secondary examination was performed. The following results were obtained by studying both the incidence rates for cholelithiasis among healthy population and the state of the disease itself:1) Incidence of observed cholelithiasis within population was 3%;2.9% male, and 3.6% in female.2) The rate of cholelithiasis which went unobserved at the initial X-ray examination was 0.15%, while the rate of obviously new cases was found to be 0.20%.3) Revealed a tendency for of cholelithiasis the incidence increasing with age.4) The rate of cholelithiasis was low in patients with diseases of the upper digestive tract, and high in patients who had been operated on for diseases of the upper digestive tract.5) 23% of population diagnosed as having cholelithiasis revealed abnormalities in tests of hepatic functions.6) "Non-symptomatic cholelithiasis" was observed in 45.8% of population diagnosed as having cholelithiasis. Of these, a high percentage was found, as a result of X-ray examination, to have abnormal risualization and contractility.
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