Table 1.
Anthropometric characteristics and polysomnographic parameters in children with obstructive sleep apnea syndrome (OSAS group) and in healthy children (control group)
| OSAS group (n = 18) | Control group (n = 25) | P | |
|---|---|---|---|
| Anthropometric characteristics | |||
| Age (y) | 9.4 ± 1.7 | 10.8 ± 2.9 | NS |
| Males (n) | 11 | 14 | NS |
| BMI (kg/m2) | 18.3 ± 1.9 | 18.6 ± 3.2 | NS |
| BMI centile | 70.3 ± 19.2 | 61.6 ± 29.2 | NS |
| Polysomnographic parameters | |||
| TST (min) | 430.95 ± 37.9 | 466.00 ± 31.5 | NS |
| S1 % | 4.1 ± 3.1 | 4.0 ± 3.9 | NS |
| S2 % | 49.8 ± 9.9 | 43.9 ± 4.1 | NS |
| SWS % | 32.9 ± 6.4 | 29.9 ± 5.3 | NS |
| REM % | 20.6 ± 8.5 | 19.1 ± 5.4 | NS |
| SE % | 83.6 ± 7.6 | 86.6 ± 5.8 | NS |
| AHI (/h) | 5.3 ± 4.8 | 0.3 ± 0.2 | 0.004 |
| SpO2(%) | 97.2 ± 1.7 | 97.7 ± 1.5 | NS |
| ODI (/h) | 1.6 ± 2.0 | 0.1 ± 0.2 | 0.03 |
| Minimal SpO2 (%) | 93.3 ± 2.4 | 96.2 ± 2.6 | 0.01 |
| Mean oxygen desaturation (%) | 95.5 ± 2.3 | 96.9 ± 1.7 | NS |
TST refers to total sleep time; SE, sleep efficiency; S1, sleep stage 1; S2, sleep stage 2; SWS, slow-wave sleep; AHI, apnea-hypopnea index (events/h); SpO2%, average overnight arterial oxygen saturation; ODI, oxygen desaturation index (events/hour).