According to the statistics of 1998, the three chronic diseases that pose the greatest threat to Chinese people's health are hepatitis B, arthritis and hypertension in order of their incidence in the total population   Among them, the incidence of arthritis and hypertension increased with age, while the incidence of hepatitis B did not differ significantly among different age groups
The average age of China's population, between 1998 and 2010, will show a significant increase and gradually enter the aging society
Between 1998 and 2010, the average age of hepatitis B patients will increase