The incidence and mortality of gastric cancer have been decreasing in recent decades. The death rate from gastric cancer in the United States dropped from 0.028% to 0.0074% for men and from 0.027% to 0.0024% for women. However, this is data from the United States. The incidence of gastric cancer in Asian countries is much higher than that in Western countries, and more than 1 million cases of gastric cancer are diagnosed each year worldwide. Gastric cancer is the fifth most common cancer in the world and the seventh most prevalent cancer.
The global cumulative risk of developing gastric cancer from birth to age 74 was 1.87% in men and 0.79% in women. Such data can't help but make us wonder, are the gastric cancer incidence rates of Asian Americans close to the US data or the photo retouching Asian data? Epidemiological studies tell us the answer, the first generation of people who migrated from high-incidence areas to low-incidence areas, the incidence of gastric cancer will be close to the data of their hometown, but the risk of gastric cancer in their offspring will be close to their immigrants. area behind.
Such findings indicate that the occurrence of gastric cancer is actually related to early environmental exposure, and perhaps carcinogens in food also have an impact. Gastric cancer is more common in developing countries and may be related to diet. Developed countries have better food preservation technology, reduce carcinogens (nitroso compounds, phenylpyrene) in food, and increase the intake of antioxidant fruits and vegetables, so that the incidence is lower.