Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Delayed sleep phase cases and controls. | Journal of Circadian Rhythms BioMed Central Open Access Delayed sleep phase cases and controls Daniel F Kripke 1 2 Katharine M Rex1 Sonia Ancoli-Israel1 3 Caroline M Nievergelt1 4 Walt Klimecki5 and John R Kelsoe1 3 Address Department of Psychiatry University of California San Diego La Jolla California 92093-0667 USA 2Scripps Clinic Sleep Center 10666 North Torrey Pines Road La Jolla California 92037 USA 3Department of Psychiatry 116A VA San Diego Health System 3350 La Jolla Village Drive San Diego CA 92161 USA 4The Scripps Research Institute 10550 North Torrey Pines Road La Jolla California 92037 USA and department of Pharmacology and Toxicology College of Pharmacy University of Arizona PO Box 210207 Tucson Arizona 85721-0207 USA Email Daniel F Kripke - Katharine M Rex-KRex@ Sonia Ancoli- Israel - SAncoliIsrael@ Caroline M Nievergelt - CNieverg@ Walt Klimecki - Klimecki@ John R Kelsoe - JKelsoe@ Corresponding author Published 29 April 2008 Received 25 February 2008 Journal of Circadian Rhythms 2008 6 6 doi 1740-3391-6-6 Accepted 29 April 2008 This article is available from http content 6 1 6 2008 Kripke et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Delayed sleep phase disorder DSPD is a condition in which patients have difficulty falling asleep before the early morning hours and commonly have trouble awakening before late morning or even early afternoon. Several studies have suggested that variations in habitual bedtime are 40-50 heritable. Methods We recruited a case series of 205 participants along with 221 controls DSPD-C with normal sleep roughly matched for age .
