Number of subjects satisfying different criteria of SDB in children
| Obese group | Control group | p value | |||
|---|---|---|---|---|---|
| Yes (%) | No (%) | Yes (%) | No (%) | ||
| All data were mean values of two nights. All indexes were events/hour. | |||||
| AI: apnoea index = total number of obstructive and central apnoea episodes per hour of sleep. | |||||
| O-AI: obstructive apnoea index = number of obstructive apnoea (OA) episodes per hour of sleep. | |||||
| RDI: respiratory disturbance index = total number of apnoea and hypopnoea episodes per hour of sleep. | |||||
| ODI: oxygen desaturation index = total number of dips in SaO2 greater than 4% per hour of sleep. | |||||
| Peak PETCO2 >53 mm Hg: peak end tidal CO2. | |||||
| NS: not significant by χ2 test, p>0.05. | |||||
| AI | |||||
| ⩾1 | 14 (30.4) | 32 (69.6) | 10 (22.7) | 34 (77.3) | NS |
| ⩾5 | 7 (15.2) | 39 (84.8) | 1 (2.3) | 43 (97.7) | NS |
| O-AI | |||||
| ⩾1 | 12 (26.1) | 34 (73.9) | 1 (2.3) | 43 (97.7) | 0.002 |
| ⩾5 | 7 (15.2) | 39 (84.8) | 1 (2.3) | 43 (97.7) | NS |
| RDI | |||||
| ⩾1 | 36 (78.3) | 10 (21.7) | 31 (70.5) | 13 (29.5) | NS |
| ⩾5 | 15 (32.6) | 31 (67.4) | 2 (4.5) | 42 (95.5) | 0.001 |
| ODI | |||||
| ⩾1.4 | 28 (39.1) | 18 (60.9) | 12 (27.3) | 32 (72.7) | 0.002 |
| Peak PETCO2 >53 mm Hg* | 9 (26.5) | 25 (73.5) | 5 (12.5) | 35 (87.5) | NS |