Table 1.
Summary of the database information: The database, year of publication, number of subjects, used signals, window size and type of classifiers (A = apnea, H = hypopnea, N = normal, S = severity, O = obstructive, G = global or obstructive sleep apnea (OSA) severity) used by selected papers (according to year).
| Paper | Year | Database | Recordings | Sensors/Signals | Window Size (Seconds) | Classification Type |
|---|---|---|---|---|---|---|
| [35] | 2008 | Apnea-ECG Database (AED) [29] | 70 | [Heart rate variability (HRV)- electrocardiogram (ECG)] | 60 | A/N |
| [60] | 2017 | Multi-Ethnic Study of Atherosclerosis (MESA) | 100 | [Nasal airflow] | 30 | OA/N |
| [47] | 2017 | AED [29] | 8 | [Blood oxygen saturation index (SpO2)] | 60 | OA/N |
| University College Dublin Sleep Apnea Database (UCD) [61] | 25 | [SpO2] | 60 | A/N | ||
| [34] | 2017 | AED [29] | 35 | [Instantaneous heart rates (IHR)-ECG] | 60 | G |
| [33] | 2017 | AED [29] | 35 | [IHR-ECG] | 60 | OA/N, G |
| AED [29] | 8 | [SpO2] | 60 | OA/N, G | ||
| [62] | 2017 | AED [29] | 35 | [ECG inter-beat intervals (RR-ECG)] | - | OA/N |
| [37] | 2018 | AED [29] | 35 | [ECG] | 60 | OA/N |
| [59] | 2018 | MESA [39] | 1507 | [Nasal airflow] | 30 | A/H/N |
| [52] | 2018 | Seoul National University Bundang Hospital (SNUBH) [52] | 120 | [Breathing sounds] | 5 | G |
| [46] | 2018 | Sleep Center of Samsung Medical Center, Seoul, Korea (SCSMC82) [46] | 82 | [ECG] | 10 | OA/N |
| [48] | 2018 | UCD [61] | 23 | [SpO2, oronasal airflow, and ribcage and abdomen movements] | 1 | OAH/N |
| [53] | 2018 | MESA [39] | 1507 | [Nasal airflow, Abdominal and thoracic plethysmography] | 30 | OA/H/N |
| [36] | 2018 | AED [29] | 35 | [HRV ECG] | 60 | OA/N |
| [51] | 2018 | Seoul National University Hospital (SNUH) [51], | 179 | [Nasal pressure] | 10 | AH/N, G |
| MESA [39] | 50 | [Nasal pressure] | 10 | AH/N, G | ||
| [38] | 2018 | Osteoporotic Fractures in Men Study (MrOS) (Visit 1) [40] | 545 | [ECG] | 15 | G |
| [57] | 2018 | MrOS (Visit 2) [40] | 520 | [Airflow] | - | G |
| [49] | 2018 | Massachusetts General Hospital (MGH) | 10 000 | [Airflow, respiration (chest and abdomen belts), SpO2] | 1 | G |
| Sleep Heart Health Study (SHHS) [50] | 5804 | [Airflow, respiration (chest and abdomen belts), SpO2] | 1 | G | ||
| [55] | 2018 | SHHS-1 [54] | 2100 | [Respiratory signals (chest and abdomen belts), ECG derived respiration (EDR)] | 30 | A/N |
| [43] | 2018 | SCSMC86 [43] | 86 | [ECG] | 10 | OA/H/N |
| [45] | 2018 | SCSMC92 | 92 | [ECG] | 10 | A/H/N, AH/N |
| [32] | 2018 | AED [29] | 70 | [RR–ECG] | 60 | OAH/N, G |