INTRODUCTION: In our country Chile it is estimated that approximately a third of the population would have had some psychiatric disorder during its life. If we consider the university population, the evolutionary stage that it experiences and the psychosocial stress that affect them, we observe a group at risk to present psychiatric disorders. The aim of the present study was to estimate the prevalence of the principal mental disorders not psychotic in the population of students of the UACH, during the year 2008. Material and Method: The sample consisted of 804 undergraduate students, that answered individually the Patient Health Questionnaire (PHQ-9), the Scale of Beck's hopelessness (HBS), the Mood Disorder Questionnaire (MDQ), the Questionnaire of detection of problematic consumption of alcohol and drugs in teenagers (DEP-ADO), the questionnaire AUDIT, the Eating Disorder Diagnostic Scale (EDDS) and the Restrain Scale (RE).

RESULTS: 27% of the students fulfills with criteria for a depression, 10, 4% deals with a bipolar disorder, 5, 3% has a moderated risk to severe of committing suicide, 24, 2% of the students presents a problematic consumption to alcohol and 15, 3% it would have some type of disorder in his supplies when eating.

CONCLUSIONS: Depression was significantly associated with a greater tendency to have abnormal eating behavior, harmful alcohol consumption and self-destructive behavior.