The scaled duration (in hours) of actual sleep per night in the past month, as part of the Pittsburgh Sleep Quality Index (PSQI).

cdRNS|FITBIR|PDBP; Q4

Copyright 1989, University of Pittsburgh. All rights reserved. Developed by Buysse,D.J., Reynolds,C.F., Monk,T.H., Berman,S.R., and Kupfer,D.J. of the University of Pittsburgh using National Institute of Mental Health Funding. Buysse DJ, Reynolds CF, Monk TH, Berman SR, Kupfer DJ: Psychiatry Research, 28:193-213, 1989. Buysse,D.J., Reynolds,C.F., Monk,T.H., Berman,S.R., & Kupfer,D.J. (1989). The Pittsburgh Sleep Quality Index (PSQI): A new instrument for psychiatric research and practice. Psychiatry Research, 28(2), 193-213. The detailed scoring instructions are at the end of this journal article. http://www.sleep.pitt.edu/content.asp?id=1484&subid=2316. caBIG - https://cdebrowser.nci.nih.gov/CDEBrowser/

The following questions relate to the subjects usual sleep habits during the past month only. Answers should indicate the most accurate reply for the majority of days and nights in the past month. Must answer all questions. Duration should be scored as follows: 7 or more hours of sleep= 0, less than 7 but 6 or more hours of sleep= 1, less than 6 and 5 or more hours= 2, less than 5= 3

During the past month, how many hours of actual sleep did you get at night? (This may different than the number of hours you spent in bed.)