Table 1.
Classification of episodes with SpO2 < 90% according to the presence of motion during the entire episode
| Episode Type A True hypoxemia | Episode Type B False hypoxemia | Episode Type C Suspected hypoxemia | Episode Type D True hypoxemia - motion free | |
|---|---|---|---|---|
| Episode count (#) | 4.3 ± 2.6 | 0.2 ± 0.4 * | 6.6 ± 3.9 | 3.1 ± 2.1 |
| Episode proportion (%) | 29.1 ± 14.6 | 1.1 ± 2.2 * | 43.2 ± 21.1 | 26.6 ± 23.3 |
| Basal SpO 2 -1 (%) | 93.6 ± 1.9 | 93.0 ± 1.0 | 94.3 ± 2.36 | 93.6 ± 2.4 |
| Basal SpO 2 -2 (%) | 93.3 ± 2.5 | 93.7 ± 1.1 | 93.4 ± 1.1 | 92.9 ± 2.4 |
| Nadir difference between SpO 2 -1 and SpO 2 -2 (%) | 2.9 ± 1.2 | 13.3 ± 2.8 * | 3.9 ± 1.4 | 3.2 ±1.3 |
| Cross correlation coefficient between SpO 2 -1 and SpO 2 -2 | 0.99 ± 0.0001 | 0.82 ± 0.053 * | 0.99 ± 0.0001 | 0.99 ± 0.0002 |
Data are mean ± SD.
*:
p<.001 type B vs all other types by General Linear Model for Repeated Measures.