The Sleep-EDF Database

Files with extensions .rec and .hyp contain original recordings and their hypnograms, respectively, in European Data Format. EDF is specified in

B Kemp, A Värri, AC Rosa, KD Nielsen, J Gade. A simple format for exchange of digitized polygraphic recordings. Electroencephalography and Clinical Neurophysiology 82:391-393 (1992).

More about EDF is on www.edfplus.info. Each EDF file has a header specifying patient, recording and signals including their calibration. Converters to (and from) WFDB native format are included in the WFDB Software Package (see edf2mit(1) in the WFDB Applications Guide). Applications using WFDB library version 10.4.5 or later can read EDF files directly with no conversion required.

The recordings were obtained from Caucasian males and females (21 - 35 years old) without any medication; they contain horizontal EOG, FpzCz and PzOz EEG, each sampled at 100 Hz. The sc* recordings also contain the submental-EMG envelope, oro-nasal airflow, rectal body temperature and an event marker, all sampled at 1 Hz. The st* recordings contain submental EMG sampled at 100 Hz and an event marker sampled at 1 Hz.

Hypnograms are manually scored according to Rechtschaffen & Kales based on Fpz-Cz / Pz-Oz EEG instead of C4-A1 / C3-A2 EEG: see

B van Sweden, B Kemp, HAC Kamphuisen, EA van der Velde. Alternative electrode placement in (automatic) sleep scoring (Fpz-Cz / Pz-Oz versus C4-A1 / C3-A2). Sleep 13(3):279-283 (1990).

The sleep stages W, 1, 2, 3, 4, R, M and 'unscored' are coded in the file as binaries 0, 1, 2, 3, 4, 5, 6 and 9 according to Q16.3 of the EDF-FAQ.

The 4 sc* recordings were obtained in 1989 from ambulatory healthy volunteers during 24 hours in their normal daily life, using a modified cassette tape recorder. Subjects, recordings and hypnogram scoring are described in

MS Mourtazaev, B Kemp, AH Zwinderman, HAC Kamphuisen. Age and gender affect different characteristics of slow waves in the sleep EEG. Sleep 18(7):557-564 (1995).

The 4 st* recordings were obtained in 1994 from subjects who had mild difficulty falling asleep but were otherwise healthy, during a night in the hospital, using a miniature telemetry system with very good signal quality. Subjects and recordings are more extensively described in the 2000 IEEE-BME paper cited above.

B Kemp, AH Zwinderman, B Tuk, HAC Kamphuisen, JJL Oberyé. Analysis of a sleep-dependent neuronal feedback loop: the slow-wave microcontinuity of the EEG. IEEE-BME 47(9):1185-1194 (2000) [PDF].

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 MD5SUMS                 18-Sep-2007 10:36  840   
 RECORDS                 25-Feb-2012 03:25  208   list of record names
 SHA1SUMS                18-Sep-2007 10:36  1.0K  
 SHA256SUMS              18-Sep-2007 12:39  1.6K  
 sc4002e0.hyp            09-Dec-2002 13:35  6.0K  EDF hypnogram
 sc4002e0.rec            11-Sep-2007 07:40   49M  EDF recording
 sc4012e0.hyp            09-Dec-2002 15:45  6.1K  EDF hypnogram
 sc4012e0.rec            11-Sep-2007 07:42   50M  EDF recording
 sc4102e0.hyp            09-Dec-2002 16:17  6.1K  EDF hypnogram
 sc4102e0.rec            11-Sep-2007 07:46   50M  EDF recording
 sc4112e0.hyp            09-Dec-2002 15:49  5.9K  EDF hypnogram
 sc4112e0.rec            11-Sep-2007 07:47   48M  EDF recording
 st7022j0.hyp            09-Dec-2002 15:53  3.1K  EDF hypnogram
 st7022j0.rec            09-Dec-2002 15:51   31M  EDF recording
 st7052j0.hyp            09-Dec-2002 15:53  3.0K  EDF hypnogram
 st7052j0.rec            09-Dec-2002 14:36   30M  EDF recording
 st7121j0.hyp            09-Dec-2002 16:29  2.9K  EDF hypnogram
 st7121j0.rec            09-Dec-2002 14:43   29M  EDF recording
 st7132j0.hyp            09-Dec-2002 16:01  2.8K  EDF hypnogram
 st7132j0.rec            09-Dec-2002 14:44   27M  EDF recording