TABLE 2.
POLYSOMNOGRAPHIC FINDINGS IN 60 CHILDREN WITH OBSTRUCTIVE SLEEP APNEA, 30 MATCHED CHILDREN WITH PRIMARY SNORING, AND 30 MATCHED CONTROL SUBJECTS
| OSA (n = 60) | PS (n = 30) | CO (n = 30) | |
|---|---|---|---|
| Sleep efficiency, % | 88.6 ± 6.0 | 91.6 ± 7.9 | 90.7 ± 8.8 |
| Sleep latency, min | 17.3 ± 14.8* | 24.7 ± 22.8 | 27.4 ± 19.9 |
| REM latency, min | 112.7 ± 49.1 | 121.1 ± 38.4 | 124.1 ± 47.7 |
| Stage 1, %TST | 10.6 ± 9.2 | 8.3 ± 4.9 | 7.8 ± 5.9 |
| Stage 2, %TST | 48.9 ± 6.6 | 42.4 ± 9.6 | 41.3 ± 9.6 |
| SWS, %TST | 19.6 ± 7.0* | 23.7 ± 6.4 | 25.2 ± 7.1 |
| REM, %TST | 22.4 ± 6.1 | 24.6 ± 7.1 | 26.6 ± 7.8 |
| Spontaneous arousal index, per hr TST | 4.4 ± 3.4† | 8.2 ± 2.8 | 7.5 ± 2.2 |
| Respiratory arousal index, per hr TST | 10.4 ± 10.1‡ | 1.8 ± 0.4 | 0.7 ± 0.5 |
| AHI, per hr TST | 12.4 ± 5.6‡ | 0.8 ± 0.4 | 0.4 ± 0.3 |
| Mean SpO2, % | 95.7 ± 1.9† | 97.8 ± 0.7 | 98.6 ± 0.4 |
| SpO2 nadir, % |
78.6 ± 6.3‡ |
93.8 ± 1.9 |
94.8 ± 1.4 |
Definition of abbreviations: AHI = apnea–hypopnea index; CO = control subjects; PS = children with primary snoring; OSA = obstructive sleep apnea; SpO2 = oxygen saturation as measured by pulse oximetry; SWS = slow wave sleep; TST = total sleep time.
*
P < 0.05, by two-way analysis of variance (ANOVA) for OSA versus CO or PS.
†
P < 0.01, by two-way ANOVA for OSA versus CO or PS.
‡
P < 0.001, by two-way ANOVA for OSA versus CO or PS.