Table 2.
Polysomnographic Parameters for REM and Non-REM OSA Patients.
| Mild-moderate OSA (n=836) |
REM OSA (n=338) |
Non-REM OSA (n=498) |
p value | |||||
|---|---|---|---|---|---|---|---|---|
| TST (min) | 375.1±72.6 | 380.0±72.4 | 369±72.1 | 0.002* | ||||
| REM sleep time/TST (%) | 16.9±6.6 | 16.8±6.3 | 17.1±6.8 | 0.50 | ||||
| Stage 1 sleep time/TST (%) | 36.2±18.1 | 31.3±16.6 | 35.9±18.0 | <0.001* | ||||
| Stage 2 sleep time/TST (%) | 45.5±16.9 | 50.6±16.1 | 42.1±16.6 | <0.001* | ||||
| Stage 3+4 sleep time/TST (%) | 1.3±3.2 | 1.4±3.5 | 1.3±2.9 | 0.25 | ||||
| Sleep latency (min) | 13.3±21.9 | 12.8±20.1 | 13.8±24.3 | 0.44 | ||||
| REM latency (min) | 127.0±78.4 | 123.1±73.8 | 129.7±81.5 | 0.13 | ||||
| AHI (events/h) | 15.7±7.0 | 14.7±6.5 | 16.5±7.2 | <0.001* | ||||
| NREM-AHI (events/h) | 14.3±7.4 | 10.5±5.8 | 16.8±7.3 | <0.001* | ||||
| REM-AHI (events/h) | 23.8±16.8 | 36.7±15.0 | 14.8±11.3 | <0.001* | ||||
| REM-AHI/NREM-AHI (events/h) | 2.4±2.9 | 4.6±3.5 | 0.9±0.6 | <0.001* | ||||
| SUP-AHI (events/h) | 25.0±16.3 | 20.3±14.5 | 28.2±16.8 | <0.001* | ||||
| NSUP-AHI (events/h) | 6.6±6.9 | 7.3±8.3 | 6.1±5.7 | 0.64 | ||||
| AI (events/h) | 4.2±4.5 | 4.0±4.1 | 4.3±4.8 | 0.42 | ||||
| HI (events/h) | 11.5±5.8 | 10.6±5.6 | 12.2±5.9 | <0.001* | ||||
| SpO2 mean (%) | 96.2±1.5 | 96.0±1.6 | 96.5±1.4 | 0.002* | ||||
| SpO2 lowest value (%) | 85.4±6.3 | 83.6±6.7 | 86.7±5.6 | <0.001* | ||||
| Mean respiratory event duration (s) | 24.9±6.2 | 24.3±6.3 | 25.3±6.1 | 0.005* | ||||
| 3% ODI (events/h) | 12.2±7.8 | 12.4±8.2 | 12.1±7.6 | 0.78 | ||||
| Arousal index (events/h) | 22.4±10.7 | 22.7±10.8 | 22.3±6.1 | 0.063 | ||||
| Periodic limb movement index (events/h) | 12.2±23.1 | 11.3±22.8 | 12.8±23.3 | 0.097 |
Continuous variables are expressed as means±standard deviations, and categorical variables are expressed as numbers (proportions).
*p<0.05. AHI: apnea and hypopnea index, NREM: non-rapid eye movement, NREM-AHI: AHI during NREM sleep, OSA: obstructive sleep apnea, REM: rapid eye movement, REM-AHI: AHI during REM sleep, SUP-AHI: AHI in supine positions, NSUP-AHI: AHI in non-supine positions, SpO2: peripheral capillary oxygen saturation, TST: total sleep time