Abstract
Geophysical and socio-medical backgrounds including dietary habits between high risk and low risk areas of gastric cancer in Liaonin Province, China, were compared and analysed. Case-control study on psychobehavioral factors was carried out. The characteristics of high risk area was acid brown soil, drinking water with high nitrates, high rate of illiterates, unfavorable eating behavior and frequent intake of salty foods and foods with mutagens. Psychobehavioral factors may associate with higher incidence of gastric cancer.