Table 2.
Data accuracy between polysomnography (PSG) and impulse-radio ultra-wideband (IR-UWB) radar according to the severity of obstructive sleep apnea (OSA).
| PSG (AHI) | IR-UWB radar (ABI) | Recall | |||
|---|---|---|---|---|---|
| Control | Mild OSA | Moderate OSA | Severe OSA | ||
| Control | 17 | 0 | 0 | 0 | 1 |
| Mild OSA | 6 | 19 | 3 | 0 | 0.68 |
| Moderate OSA | 0 | 5 | 11 | 0 | 0.69 |
| Severe OSA | 0 | 0 | 0 | 33 | 1 |
| Precision | 0.74 | 0.79 | 0.78 | 1 | 0.85 |
The severity of OSA was categorized as follows: control (ABI or AHI < 5), mild (5 ≤ ABI or AHI < 15), moderate (15 ≤ ABI or AHI < 30), and severe (ABI or AHI ≥ 30).
ABI, Abnormal Breathing Index; AHI, Apnea–hypopnea Index.
The value of the overall agreement is 0.85.