St. Vincent's University Hospital / University College Dublin Sleep Apnea Database

This database contains 25 full overnight polysomnograms with simultaneous three-channel Holter ECG, from adult subjects with suspected sleep-disordered breathing. A revised version of this database was posted on 1 September 2011.

Subjects

Subjects were randomly selected over a 6-month period (September 02 to February 03) from patients referred to the Sleep Disorders Clinic at St Vincent's University Hospital, Dublin, for possible diagnosis of obstructive sleep apnea, central sleep apnea or primary snoring. Subjects had to be above 18 years of age, with no known cardiac disease, autonomic dysfunction, and not on medication known to interfere with heart rate. Twenty-five subjects (21M, 4F) were selected (age: 50 ± 10 years, range 28-68 years; BMI: 31.6 ± 4.0 kg/m², range 25.1-42.5 kg/m²; AHI: 24.1 ± 20.3, range 1.7-90.9). Details are shown below:

Study Number	Height (cm)	Weight (kg)	Gender	PSG Start Time	PSG AHI	BMI	Age	Epworth Sleepiness Score	Study Duration (hr)	Sleep Efficiency (%)	PSG Duration (seconds)
ucddb002	172	100.3	M	0:11:04	23	33.9	54	16	6.2	84	22470
ucddb003	179	102	M	23:07:50	51	31.8	48	13	7.3	81	26478
ucddb005	176	100.4	M	23:28:42	13	32.4	65	19	6.9	63	24798
ucddb006	185	103.5	M	23:57:14	31	30.2	52	3	6.7	89	24267
ucddb007	183	84	M	23:30:22	12	25.1	47	15	6.8	90	24405
ucddb008	145	59.8	F	23:29:11	5	28.4	63	1	6.4	64	23041
ucddb009	180	101.5	M	22:35:22	12	31.3	52	19	7.7	80	27759
ucddb010	174	119	M	22:51:18	34	39.3	38	2	7.6	92	27211
ucddb011	188	101	M	22:47:38	8	28.6	51	8	7.5	60	27030
ucddb012	179	97.5	M	23:23:21	25	30.4	51	16	7.2	85	25941
ucddb013	153	80	F	23:44:00	16	34.2	62	10	6.8	61	24333
ucddb014	177	91	M	23:37:59	36	29	56	5	6.4	79	23239
ucddb015	170	83.9	M	23:02:45	6	29	28	2	7.6	77	27488
ucddb017	176	117	M	23:16:05	12	37.8	53	7	6.6	87	23684
ucddb018	171	77	M	23:49:02	2	26.3	35	10	6.8	60	24685
ucddb019	178	97.8	M	23:30:33	16	30.9	49	18	7.1	92	25573
ucddb020	179	108.8	M	23:48:21	15	34	52	11	6.3	78	22586
ucddb021	161	87	F	22:52:05	13	33.6	41	13	7.6	82	27409
ucddb022	166	80.7	M	23:35:05	7	29.3	34	4	6.6	58	23640
ucddb023	165	89	F	22:55:51	39	32.7	68	13	7.2	67	25850
ucddb024	172	99.9	M	22:58:02	24	33.8	54	19	7.6	83	27250
ucddb025	174	128.6	M	0:25:37	91	42.5	52	24	5.9	77	21350
ucddb026	175	84	M	22:58:13	14	27.4	49	9	7	87	25160
ucddb027	182	93	M	22:56:30	55	28.1	45	10	7.4	86	26791
ucddb028	172	88.9	M	0:29:08	46	30.1	50	13	6	68	21660

(The contents of the table above are also available in SubjectDetails.xls.)

Signals

Polysomnograms were obtained using the Jaeger-Toennies system (Erich Jaeger GmbH, Germany). Signals recorded were: EEG (C3-A2), EEG (C4-A1), left EOG, right EOG, submental EMG, ECG (modified lead V2), oro-nasal airflow (thermistor), ribcage movements, abdomen movements (uncalibrated strain gauges), oxygen saturation (finger pulse oximeter), snoring (tracheal microphone) and body position. The files named with .rec suffixes contain these signals in EDF format.

Three-channel Holter ECGs (V5, CC5, V5R) were recorded using a Reynolds Lifecard CF system (Reynolds Medical, UK); the files named with _lifecard.edf suffixes contain these ECG signals in EDF format. The recording dates and times are not available. In record ucddb002, only two distinct ECG signals were recorded; the second ECG signal was also used as the third signal.

Annotations

Sleep stages were scored by an experienced sleep technologist according to standard Rechtschaffen and Kales rules (see the _stage.txt files). Annotations in these files are:

Annotation	Meaning
0	Wake
1	REM
2	Stage 1
3	Stage 2
4	Stage 3
5	Stage 4
6	Artifact
7	Indeterminate

Onset time and duration of respiratory events (obstructive, central, mixed apneas and hypopneas, and periodic breathing episodes) were annotated by the same sleep technologist (see the _respevt.txt files). Terms used in these files include:

1st column	Time of occurrence (time of day)
2nd column	HYP Hypopnea C Central O Obstructive M Mixed
3rd column	Periodic breathing (PB)/ Cheynes-Stokes (CS)
9th & 10th columns	Bradycardia/ Tachycardia

Acknowledgments

These recordings were collected at St. Vincent's University Hospital Sleep Disorders Clinic, under the direction of Prof. Walter McNicholas. Dr. Liam Doherty, Dr. Silke Ryan, and Dr. John Garvey collected and assembled the clinical and demographic information, and Ms. Patricia Boyle was responsible for polysomnogram scoring and annotation. Eric Chua was responsible for de-identification and electronic archiving of records.

Contact information

Conor Heneghan, PhD
School of Electrical, Electronic and Mechanical Engineering
University College Dublin
Belfield
Dublin 4
Ireland
Email: conor.heneghan at ucd dot ie

Technical contact: Eric C.-P. Chua (eric dot chua dot 2 at gmail dot com)

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 RECORDS                 08-Feb-2008 14:11  875   list of record names
 SubjectDetails.xls      01-Sep-2011 13:10   11K  
 ucddb002.rec            01-Sep-2011 12:55   27M  
 ucddb002_lifecard.edf   01-Sep-2011 12:59   20M  
 ucddb002_respevt.txt    24-Jul-2003 14:57  9.7K  
 ucddb002_stage.txt      29-Oct-2006 15:26  2.2K  
 ucddb003.rec            01-Sep-2011 12:55   32M  
 ucddb003_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb003_respevt.txt    05-Jan-2004 14:39   24K  
 ucddb003_stage.txt      29-Oct-2006 15:26  2.6K  
 ucddb005.rec            01-Sep-2011 12:55   30M  
 ucddb005_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb005_respevt.txt    10-Dec-2003 10:31  4.5K  
 ucddb005_stage.txt      29-Oct-2006 15:26  2.4K  
 ucddb006.rec            01-Sep-2011 12:55   30M  
 ucddb006_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb006_respevt.txt    09-Jan-2004 10:08   17K  
 ucddb006_stage.txt      29-Oct-2006 15:26  2.4K  
 ucddb007.rec            01-Sep-2011 12:55   30M  
 ucddb007_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb007_respevt.txt    09-Jan-2004 11:18  5.9K  
 ucddb007_stage.txt      29-Oct-2006 15:26  2.4K  
 ucddb008.rec            01-Sep-2011 12:55   28M  
 ucddb008_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb008_respevt.txt    25-Jul-2003 09:09  1.7K  
 ucddb008_stage.txt      29-Oct-2006 15:26  2.3K  
 ucddb009.rec            01-Sep-2011 12:55   34M  
 ucddb009_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb009_respevt.txt    10-Sep-2003 14:24  6.1K  
 ucddb009_stage.txt      29-Oct-2006 15:26  2.7K  
 ucddb010.rec            01-Sep-2011 12:55   33M  
 ucddb010_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb010_respevt.txt    10-Sep-2003 12:00   18K  
 ucddb010_stage.txt      29-Oct-2006 15:26  2.7K  
 ucddb011.rec            01-Sep-2011 12:55   40M  
 ucddb011_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb011_respevt.txt    19-Dec-2003 15:57  2.8K  
 ucddb011_stage.txt      29-Oct-2006 15:26  2.6K  
 ucddb012.rec            01-Sep-2011 12:55   32M  
 ucddb012_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb012_respevt.txt    08-Jan-2004 14:51   12K  
 ucddb012_stage.txt      29-Oct-2006 15:26  2.5K  
 ucddb013.rec            01-Sep-2011 12:55   30M  
 ucddb013_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb013_respevt.txt    19-Dec-2003 15:06  5.1K  
 ucddb013_stage.txt      29-Oct-2006 15:26  2.4K  
 ucddb014.rec            01-Sep-2011 12:55   28M  
 ucddb014_lifecard.edf   01-Sep-2011 12:59   20M  
 ucddb014_respevt.txt    10-Sep-2003 11:02   14K  
 ucddb014_stage.txt      29-Oct-2006 15:26  2.3K  
 ucddb015.rec            01-Sep-2011 12:55   34M  
 ucddb015_lifecard.edf   01-Sep-2011 12:59   23M  
 ucddb015_respevt.txt    07-Jan-2004 14:15  3.1K  
 ucddb015_stage.txt      29-Oct-2006 15:26  2.7K  
 ucddb017.rec            01-Sep-2011 12:55   29M  
 ucddb017_lifecard.edf   01-Sep-2011 12:59   20M  
 ucddb017_respevt.txt    09-Dec-2003 11:18  5.4K  
 ucddb017_stage.txt      29-Oct-2006 15:26  2.3K  
 ucddb018.rec            01-Sep-2011 12:55   30M  
 ucddb018_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb018_respevt.txt    12-Dec-2003 15:28  916   
 ucddb018_stage.txt      29-Oct-2006 15:26  2.4K  
 ucddb019.rec            01-Sep-2011 12:55   31M  
 ucddb019_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb019_respevt.txt    08-Jan-2004 13:50  8.1K  
 ucddb019_stage.txt      29-Oct-2006 15:26  2.5K  
 ucddb020.rec            01-Sep-2011 12:55   28M  
 ucddb020_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb020_respevt.txt    08-Jan-2004 09:54  5.8K  
 ucddb020_stage.txt      29-Oct-2006 15:26  2.2K  
 ucddb021.rec            01-Sep-2011 12:55   33M  
 ucddb021_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb021_respevt.txt    07-Jan-2004 16:29  6.3K  
 ucddb021_stage.txt      29-Oct-2006 15:26  2.7K  
 ucddb022.rec            01-Sep-2011 12:55   29M  
 ucddb022_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb022_respevt.txt    08-Jan-2004 11:09  2.4K  
 ucddb022_stage.txt      29-Oct-2006 15:26  2.3K  
 ucddb023.rec            01-Sep-2011 12:55   32M  
 ucddb023_lifecard.edf   01-Sep-2011 12:59   23M  
 ucddb023_respevt.txt    12-Dec-2003 14:43   15K  
 ucddb023_stage.txt      29-Oct-2006 15:26  2.5K  
 ucddb024.rec            01-Sep-2011 12:55   33M  
 ucddb024_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb024_respevt.txt    06-Jan-2004 08:47   12K  
 ucddb024_stage.txt      29-Oct-2006 15:26  2.7K  
 ucddb025.rec            01-Sep-2011 12:55   26M  
 ucddb025_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb025_respevt.txt    09-Dec-2003 09:27   33K  
 ucddb025_stage.txt      29-Oct-2006 15:26  2.1K  
 ucddb026.rec            01-Sep-2011 12:55   31M  
 ucddb026_lifecard.edf   01-Sep-2011 12:59   21M  
 ucddb026_respevt.txt    05-Jan-2004 15:59  6.7K  
 ucddb026_stage.txt      29-Oct-2006 15:26  2.5K  
 ucddb027.rec            01-Sep-2011 12:55   33M  
 ucddb027_lifecard.edf   01-Sep-2011 12:59   22M  
 ucddb027_respevt.txt    07-Jan-2004 15:25   32K  
 ucddb027_stage.txt      29-Oct-2006 15:26  2.6K  
 ucddb028.rec            01-Sep-2011 12:55   26M  
 ucddb028_lifecard.edf   01-Sep-2011 12:59   20M  
 ucddb028_respevt.txt    09-Sep-2003 10:36   15K  
 ucddb028_stage.txt      29-Oct-2006 15:26  2.1K