Dr. Sami Hamdan is currently working as an Assistant Professor at the Academic College of Tel-Aviv Jaffa. He completed graduate studies in Clinical psychology at Bar-Ilan University. As a Fulbright scholar he spent his Post-doctoral fellowship at Western Psychiatric and Clinic Institution, University of Pittsburgh, with Prof. David Brent. His academic research focuses on Suicidal behaviors and Bereavement and psychopathology among minority groups. Dr. Hamdan has published several original papers and actively participated in scientific meetings.


We aimed to investigate the eff ect of sleep problems, depression and cognitive processes on suicidal risk among 460 young adults. Th ey completed self-report questionnaires assessing suicidal behavior, sleep quality, depressive symptoms, emotion regulation, rumination and impulsivity. Suicidal participants exhibited higher rates of depressive symptoms, sleep problems, expressive suppression, rumination and impulsivity. A confi rmatory factor analysis model revealed pathways to suicidal risk that showed no direct pathways between sleep problems and suicidal risk. Instead, sleep was related to suicidal risk via depression and rumination which in turn increased suicidal risk. Th ese results suggest that addressing sleep problems will be useful in either the treatment or prevention of depressive and rumination symptoms and reduction in suicidal risk.