METHODSSampleThis is a case-control

METHODS
Sample
This is a case-control study. Cases included in the study were selected from consecutive patients who were followed-up for type 2 DM and admitted to endocrinology outpatient clinic of Karadeniz Technical University Medical School between January 1 and March 31, 2007. Required permission was taken from local ethical council before study commenced. A total
of 100 patients were recruited who accepted to participate in the study after appropriate information about the aim and rationale of the study was given and who signed informed consent form. Patients who had history of a psychotic disorder and dementia and had a psychiatric disorder and used psychotropic medication in the past 6 months were excluded from the study. Patients who did not have educational level which avoided them from understanding tests and having mental or social retardation were also excluded from the study. Control group consisted of people working in the hospital or patients’ relatives who volunteered to participate in the study after being informed about the aim and rationale of the study. The members of the control group had no psychiatric disorder and treatment and they matched the same characteristics with the patients such as age, gender and marital status. All volunteers completed the study.