Chronic gastritis （CG） is an inflammatory condition of the gastric mucosa, induced by various causes. A commonly-seen disease in clinical practice, it is found in about 80%-90% of patients undergoing gastroscopic examination. The prevalence rate in the general population remains unclear. It is generally considered that its incidence rate accords with Helicobacter. pylori infection rate and the prevalence of CG is 30%-80% in China. Possible etiological factors include H. pylori infection, smoking, drinking alcohol, food allergies, duodenal juice reflux, drug-induced injuries, heredity, immunity, and radiation.^[1-8].
BACKGROUND Primary osteoporosis is a disease characterized by low bone mass and microarchitectural deterioration of bone tissue,leading to enhanced bone fragility and a consequent increase in fracture risk. Primary osteoporosis is particularly common in senile persons and in postmenopausal women.It ranks the fifth of diseases in the modern society.
