Inspection for XXXX at regular intervals is the optimum program for the screening of @entity356 .

@entity1 @entity5 @entity204 @entity356
Gastric occult blood screening has been performed for 242296 @entity1 from 1986 to 1993. 30227 @entity1 had positive reactions to the occult blood reagent. Among them, 17915 @entity1 were asked to accept gastroscopy exam, and 638 @entity356 were found. The @entity5 detection rates were 3.56%. 4774 @entity1 were asked to accept screening twice and 203 @entity1 were asked to accept screening three times. After follow-up, the @entity5 detection rates were 2.11% for occult blood positive group if the screening was conducted once a year. The missing case was 0.77% for negative group and it was 0.05% in the same group if the screening was performed twice. Lastly, the missing case would be decreased to 0% when the @entity1 undergone the exam, for three times in continuity. Two thirds of @entity1 still belonged to the early-middle stage of @entity5 . The 5-year survival rates were 95.2%. The missing case of @entity5 would be reduced to 0% if the screening was conducted for three years in continuity. The @entity204 rates were deducted as well. It is certified that this method is the most effective and reliable way for reducing the @entity204 rate of @entity5 and screening of the upper digestive tract @entity5 .
