The most important way to prevent stomach cancer is to avoid cigarette smoking. Eating more fruits and vegetables and less smoked or pickled foods, salt, and foods with a high amount of nitrates is helpful as well.
Wear protective garments if working in the coal mining, nickel processing, rubber, or timber industries. Occupational exposure in these industries has been shown to increase the risk of gastric cancer.
The PDQ editorial boards use a ranking system of levels of evidence to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy. For any given therapy, results of prevention and treatment studies can be ranked on each of the following two scales:
Strength of the study design.
Strength of the endpoints.
Together, the two rankings provide a measure of the overall level of evidence. Screening studies are ranked on strength of study design alone...