Abstract: PURPOSE: To explore the incidence of recurrent oral ulcer and the relationship with A personality, and to provide evidences for making strategies for oral health education and premunition in universities. METHODS: Stratified cluster sampling was used to select 492 college students in Gannan Medical University. They were investigated with the question about occurrence of recurrent oral ulcers in the past year and the questionnaire of type A behavior. The data were analyzed by descriptive statistics, Chi-square test, t test and Logistic test using SPSS 19.0 software package. RESULTS: The results showed that only 109(22.15%) students had no recurrent oral ulcer. The proportion of type A personality students were significantly higher than M and type B students. Students with or without recurrent oral ulcer in the past year had significant difference in TH+CH(t=4.596,P<0.001),TH (t=4.145,P<0.001), CH(t=3.781,P<0.001).The risk factors of recurrent oral ulcer with college students was type A personality(OR=2.322,CI=1.355-3.980,P=0.002). CONCLUSIONS: College students have a higher incidence of recurrent oral ulcer. Type A personality is one of the important factors for recurrent oral ulcer in college students.

Key words: College students, Recurrent oral ulcer, Type A personality