Table 3.
Pearson correlation coefficients for type III and type IV PM devices
| AHI (PM) | AHI (PSG) | AI (PM) | AI (PSG) | HI (PM) | HI (PSG) | |
|---|---|---|---|---|---|---|
| Correlation between type III PM devices and PSG testing | ||||||
| AHI (PM) | 1.00 | 0.92 | 0.93 | 0.94 | 0.22 | – 0.32 |
| AHI (PSG) | 0.92 | 1.00 | 0.85 | 0.92 | 0.2 | – 0.08 |
| AI (PM) | 0.93 | 0.85 | 1.00 | 0.95 | – 0.15 | – 0.48 |
| AI (PSG) | 0.94 | 0.92 | 0.95 | 1.00 | 0.01 | – 0.46 |
| HI (PM) | 0.22 | 0.2 | – 0.15 | 0.01 | 1.00 | 0.43 |
| HI (PSG) | – 0.32 | – 0.08 | – 0.48 | – 0.46 | 0.43 | 1.00 |
| Correlation between type IV PM devices and PSG testing | ||||||
| AHI (PM) | 1.00 | 0.69 | 0.97 | 0.63 | – 0.07 | 0.02 |
| AHI (PSG) | 0.69 | 1.00 | 0.73 | 0.9 | – 0.31 | 0.05 |
| AI (PM) | 0.97 | 0.73 | 1.00 | 0.68 | – 0.3 | – 0.02 |
| AI (PSG) | 0.63 | 0.9 | 0.68 | 1.00 | – 0.35 | – 0.39 |
| HI (PM) | – 0.07 | – 0.31 | – 0.3 | – 0.35 | 1.00 | 0.14 |
| HI (PSG) | 0.02 | 0.05 | – 0.02 | – 0.39 | 0.14 | 1.00 |
AHI (PM), AI (PM), and HI (PM) manifested the result of type III or type IV PM devices; AHI (PSG), AI (PSG), and HI (PSG) manifested the result of PSG. AHI, apnea-hypopnea index; AI, apnea index; HI, hypopnea index; PM, portable monitor; PSG, polysomnography.