Objective   To investigate the possible risk factors of functional dyspepsia（FD） in Beijing university students.    Methods   490764 random samples were selected. A self-reported questionnaire containing ROME III questionnaire and other questions regarding food habit

studying style

past history

etc was delivered to all students. The factors related to FD were compared between the two groups.   Results   To distribute questionnaire 9800

call in 8608.The response rate is 87.8%

the qualification rate is 80.8%. A total of 602 youth were divided into FD group (110 cases) and control group (492 cases without any symptoms related to FD). The differences between the two groups were found as follows: ① Indexes in height

weight and body mass in FD group were significantly lower than those in the control group (P0.05

P0.01). ② The occurrence rate of engorgement

being choosy in food

often eating omophagia

cold drinking

overheated food

pungent food

dry and hard food

milk food

dietetic restraint

and wine drinking in FD group was significantly higher than that in the control group (P0.01). ③ The cases in FD group had significantly less time for relaxation

sleep

physical activities

rest on weekends than those in the control group (P0.01). Much more cases in FD group liked to stay up studying and felt stress and press in study than those in the control group (P0.05). ④ More cases had the history of food allergy

frequent oral administration of drugs

surgical trauma and operation

dysentery

gastroenteritis

liver and gall  and pancreas diseases and the similar familial symptoms of FD in FD group than those in the control group (P0.05). ⑤ Logistic regression analysis showed FD was positively correlated with being choosy in food

lesser movement time

smoking

frequent oral administration of drugs

history of surgical trauma and operation

history of gastroenteritis

history of similar familial symptoms

but negatively with sleep time.   Conclusion   The above mentioned factors

especially being often choosy in food

less movement time

smoking

frequent oral administration of drugs

history of surgical trauma and operation

history of gastroenteritis

history of similar familial symptoms and less sleep might be the risk factors in FD.