Table 2.
The results of the linear mixed-effects model predicting the degree of oxygen desaturation measured at fingertip.
| Estimate (10−2) |
95% CI (10−2) |
t-Value | p-Value | |
|---|---|---|---|---|
| Duration of event | 7.83 | [7.01, 8.66] | 18.68 | <0.0001 |
| CPAP pressures | −12.12 | [−13.93, −10.31] | −13.10 | <0.0001 |
| Hypopnea–Apnea | −115.6 | [−134.9, −96.3] | −11.71 | <0.0001 |
| Per-hour AHI | 1.42 | [1.14, 1.70] | 9.87 | <0.0001 |
| Sleep stages | ||||
| Deep sleep–light sleep | −68.82 | [−89.56, −48.08] | −6.51 | <0.0001 |
| REM sleep–light sleep | −56.41 | [−82.13, −30.69] | −4.30 | <0.0001 |
| AHI of diagnostic night | 1.93 | [0.35, 3.50] | 2.39 | 0.024 |
CI: Confidence interval. CPAP: Continuous positive airway pressure. REM: Rapid eye movement sleep. Per-hour AHI is the number of apnea/hypopnea events divided by the sleep duration under each CPAP pressure per hour. Hypopnea–Apnea means the change in apnea is the reference for the change in hypopnea in this model, i.e., the changes in hypopnea minus the changes in apnea. Non-rapid eye movement light sleep (stage N1 and N2) is the reference for deep sleep (stage N3) and REM sleep.