Table 2.
Arousals, respiratory events, and sleep architecture of subjects studied on or off CPAP
| CPAP | Arousals and respiratory events |
Sleep architecture |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AI (no./h TST), NR = 9 ± 3 |
AHI (no./hr TST), NR = 0.1 ± 0.1 |
SpO2 nadir (%), NR = 93 ± 4 |
N1 (% TST), NR = 5 ± 3 |
N2 (% TST), NR = 42 ± 8 |
N3 (% TST), NR = 26 ± 8 |
REM (% TST), NR = 20 ± 5 |
||||||||
| On | Off | On | Off | On | Off | On | Off | On | Off | On | Off | On | Off | |
| Subject | ||||||||||||||
| 1 | 20.7 | 42.9 | 4.1 | 5.4 | 86 | 90 | 9.8 | 13.7 | 42.6 | 52.6 | 27.6 | 19.5 | 20.1 | 14.3 |
| 2 | 13.6 | 15.3 | 0.2 | 2.2 | 94 | 90 | 9.7 | 6.0 | 55.0 | 45.1 | 24.4 | 18.2 | 24.4 | 18.0 |
| 3 | 7.2 | 4.7 | 0 | 0 | 93 | 94 | 2.8 | 0.8 | 44.4 | 40.1 | 29.4 | 36.5 | 23.4 | 22.6 |
| 4 | 8.0 | 14.1 | 0 | 1.2 | 95 | 92 | 16.1 | 4.7 | 47.8 | 38.5 | 18.2 | 34.9 | 18.0 | 10.0 |
| 5 | 8.1 | 7.4 | 0 | 0.1 | 95 | 97 | 3.0 | 7.3 | 42.3 | 49.6 | 29.5 | 29.0 | 25.2 | 14.1 |
| 6 | 5.4 | 0 | 95 | 2.6 | 46.3 | 32.7 | 18.4 | |||||||
| 7 | 10.0 | 0.4 | 88 | 10.1 | 51.7 | 28.4 | 9.7 | |||||||
| 8 | 8.7 | 0.1 | 93 | 6.5 | 60.6 | 9.4a | 23.6 | |||||||
| 9 | 11.1 | 0.1 | 94 | 6.2 | 37.7 | 24.3 | 19.2 | |||||||
| P valueb | 0.1 | 0.1 | 0.8 | 0.9 | 0.8 | 0.9 | 0.7 | |||||||
Normal ranges (NR) (mean ± sd) for healthy children (43) are shown. SpO2, Oxygen saturation; TST, total sleep time.
a
Note that subject 8 had less N3 than normal because PSG began after he had been asleep for 2 h, likely missing the first episode of N3 of the night.
b
P value for paired t test.