Sweileh, Waleed M. 1 / Ali, Iyad 1 / Sawalha, Ansam F. 1 / Abu-Tah, Adham S. 1 / Zyoud, Sa’ed H. 1 / Al-Jabi, Samah W. 1 1College of Medicine and Health Sciences, An-Najah National University, Nablus, Palestinian Authority Corresponding author: Adham S. Abu-Taha, Assistant Professor, Clinical Pharmacology, Department of Pharmacology and Toxicology, School of Pharmacy, An-Najah National University, PO Box 7, Nablus, Palestinian Authority (email)

 A convenience sample of 400 students were recruited to investigate gender differences in sleep habits and sleep-related problems using a self-administered questionnaire. Univaraiate analysis showed that females went to bed earlier (p<0.01) and rose earlier (p<0.01), had longer sleep duration (p<0.01), more nightmares (p<0.01), lesser snoring (p<0.01), lesser nocturnal awakening caused by eating (p<0.01), and had poorer sleep quality than males on the night of examination (p<0.01). Gender differences in sleep habits and sleep problems were found and were different than those reported from other cultures. Keywords: gender differences; sleep habits; undergraduates