TABLE 3.
Polysomnography characteristics of Chiari malfomation type 1 children with and without sleep-disordered breathing (SDB)
| Characteristic |
SDB
|
P | |
|---|---|---|---|
| Yes (total AHI ≥2/h and/or nocturnal hypoventilation) (n=33) | No (total AHI <2/h and no nocturnal hypoventilation) (n=35) | ||
| Sleep architecture | |||
| Total sleep time, min | 408.5 (347.9–472.4) | 408 (355.5–457.5) | 0.79 |
| Sleep efficiency, % | 87.45 (80.93–92.78) | 85.80 (77.65–91.80) | 0.42 |
| Non-REM sleep, % | 79.25 (75.13–83.43) | 81.70 (78.85–86.75) | 0.027 |
| REM sleep, % | 20.75 (16.58–24.88) | 18.30 (13.25–21.15) | 0.027 |
| Arousal index, events/h | 12 (8.35–19.23) | 9.4 (6.2–13.10) | 0.076 |
| Respiratory events | |||
| Obstructive AHI | 1.9 (0.7–5.7) | 0.3 (0–0.8) | <0.0001 |
| Central apnea index | 2.4 (0.63–8.95) | 0.3 (0–0.75) | <0.0001 |
| Total AHI | 7.45 (2.83–14.55) | 0.8 (0.45–1.3) | <0.0001 |
| Gas exchange | |||
| Nadir O2 desaturations | 86.5 (80.25–90.98) | 92.3 (90.65–94) | <0.0001 |
| Presence of hypoventilation, n (%) | 6 (9) | 0 (0) | <0.0001 |
Data presented as median (interquartile range) unless otherwise indicated. AHI Apnea-hyponea index; REM Rapid eye movement