Table 1.
Pearson Correlation Coefficients Between Sleep-Disordered Breathing Indices Defined According to Type of Event (Apnea, Hypopnea, or Both) and Level of Oxyhemoglobin Desaturation (0.0%–1.9%, 2.0%–2.9%, 3.0%–3.9%, ≥4.0%)
| AHI0.0–1.9% | AHI2.0–2.9% | AHI3.0–3.9% | AHI≥4.0% | |
|---|---|---|---|---|
| AHI0.0-1.9% | 1.00 | 0.53 | 0.11 | −0.16 |
| AHI2.0-2.9% | 1.00 | 0.73 | 0.15 | |
| AHI3.0-3.9% | 1.00 | 0.51 | ||
| AHI≥4.0% | 1.00 | |||
| HI0.0–1.9% | 0.99 | 0.51 | 0.07 | −0.19 |
| HI2.0–2.9% | 0.53 | 0.98 | 0.68 | 0.11 |
| HI3.0-3.9% | 0.08 | 0.70 | 0.95 | 0.47 |
| HI≥4.0% | −0.16 | 0.18 | 0.52 | 0.85 |
| AI0.0–1.9% | 0.23 | 0.27 | 0.29 | 0.26 |
| AI2.0–2.9% | 0.19 | 0.43 | 0.43 | 0.19 |
| AI3.0–3.9% | 0.11 | 0.38 | 0.57 | 0.33 |
| AI≥4.0% | −0.11 | 0.06 | 0.32 | 0.82 |
| HI0.0–1.9% | HI2.0–2.9% | HI3.0–3.9% | HI≥4.0% | |
| HI0.0–1.9% | 1.00 | 0.52 | 0.07 | −0.17 |
| HI2.0–2.9% | 1.00 | 0.71 | 0.19 | |
| HI3.0-3.9% | 1.00 | 0.57 | ||
| HI≥4.0% | 1.00 | |||
| AI0.0–1.9% | 0.11 | 0.12 | 0.11 | 0.07 |
| AI2.0–2.9% | 0.11 | 0.23 | 0.19 | 0.03 |
| AI3.0–3.9% | 0.04 | 0.23 | 0.27 | 0.10 |
| AI≥4.0% | −0.15 | 0.00 | 0.20 | 0.40 |
AHI = apnea-hypopnea index, AI = apnea index, HI = hypopnea index