Table 3.
Confusion matrix for epoch-by-epoch sleep staging in MESA.
| CReSS Sleep Staging | PSG Sleep Staging | |||
|---|---|---|---|---|
| CReSS Applied to Heart Rate and Airflow Signals | ||||
| Wake | REM Sleep | Light Sleep | Deep Sleep | |
| Wake | 55,524 | 943 | 7,383 | 203 |
| 71.0%* | 2.3% | 4.9% | 0.8% | |
| REM sleep | 3,152 | 32,275 | 6,115 | 68 |
| 4.0% | 80.1%* | 4.1% | 0.3% | |
| Light sleep | 19,267 | 7,004 | 126,217 | 11,271 |
| 24.6% | 17.4% | 84.4%* | 46.6% | |
| Deep sleep | 280 | 88 | 9,802 | 12,655 |
| 0.4% | 0.2% | 6.6% | 52.3%* | |
| PPV | 86.7% | 77.6% | 77.1% | 55.4%* |
| CReSS Applied to Heart Rate, Airflow, and Thoracic Respiratory Effort Signals | ||||
| Wake | REM Sleep | Light Sleep | Deep Sleep | |
| Wake | 59,487 | 598 | 7,299 | 131 |
| 76.0%* | 1.5% | 4.9% | 0.5% | |
| REM sleep | 2,752 | 34,390 | 6,009 | 69 |
| 3.5% | 85.3%* | 4.0% | 0.3% | |
| Light sleep | 15,837 | 5,265 | 127,388 | 11,987 |
| 20.2% | 13.1% | 85.2%* | 49.5% | |
| Deep sleep | 147 | 57 | 8,821 | 12,010 |
| 0.2% | 0.1% | 5.9% | 49.6%* | |
| PPV | 88.1% | 79.6% | 79.4% | 57.1%* |
*Values are the number of epochs of each PSG-scored sleep stage that were correctly identified by CReSS and the percentage of epochs within each PSG-defined sleep stage that were correctly identified by CReSS (that is, sensitivity). The percentage values labeled as PPV represent the percentage of epochs within each CReSS-defined sleep stage that was correct per PSG. CReSS = CardioRespiratory Sleep Staging, MESA = Multi-Ethnic Study of Atherosclerosis, PPV = positive predictive value, PSG = polysomnography, REM = rapid eye movement.