purpose of the study to asses the relationship between psychiatric disorders and night eating syndrome.

subjects were recruited from psychiatric outpatient clinic at The Sisli Etfal Teaching and Research Hospital (n=384). Night Eating Syndrome Questionnaire and Structured Clinical Interview for DSM-IV diagnosis (SCID) researchers version were used as screening tools.

304 patient were female (%79,2), 80 were male (%20,8). Mean age of patients were 37,5±13,7.

Two hundred seven participants (%54) scored ≥20 on the Night Eating Syndrome Questionnaire. 168 of these were female, 39 were male.

Our sample was screened with SCID for psychiatric diagnosis and we found 51% depression (comorbid diagnosis also included); 13,5% bipolar disorder; 8,3% generalized anxiety disorder (GAD); 6,5% panic disorder; 4,7% obsessive compulsive disorder (OCD); 4,2% social phobia; 2,9 % adjustment disorder; 2,1% somatoform disorder, 1,6% schizophrenia; 0,5% eating disorders.

Statistically significant rates of bipolar disorder were found amoung patients diagnosed with NES (p=0,037). The relationship between NES and psychiatric disorders other than bipolar disorder were not statistically significant in our study.

There are limited published data about psychiatric comorbidity with NES. These studies reported comorbidity with depression, substance use disorders and sleep disorders . In our study we found strong relationship between bipolarity and NES. Despite high rate of depression with NES in our study and in the literature, our findings didn't support the relationship between NES and depression.