Table 2. Polysomnographic Data for Normal-Weight, Overweight, and Obese Adolescentsa.
| Variable | Mean (SD) | Absolute Difference in Mean (95% CI)b | |||
|---|---|---|---|---|---|
| Total | Normal Weight | Overweight | Obese | ||
| AHI | 14.9 (28.7) | 7.2 (21.6) | 9.2 (23.7) | 18.3 (30.9) | 11 (0.02 to 22) |
| CAI | 0.51 (1.6) | 0.15 (0.32) | 0.44 (0.92) | 0.61 (1.9) | 0.46 (−0.16 to 1.01) |
| REM | 15 (7.0) | 15.8 (7.1) | 16 (6.7) | 14.5 (7.1) | 1.5 (−0.83 to 3.8) |
| Sleep efficiency | 77.6 (16.1) | 79.2 (17.4) | 82.0 (12) | 75.9 (16.7) | 6.0 (0.65 to 11.4) |
| Arousal index | 17.2 (19.7) | 12.9 (13.6) | 15.0 (17.0) | 11.4 (11.2) | 5.8 (−1.9 to 13.4) |
| Sao2 nadir | 88.2 (7.3) | 91.3 (5.2) | 88.6 (6.6) | 87.5 (7.7) | 3.8 (0.98 to 6.6) |
| Peak CO2 | 47.4 (6.0) | 47.5 (5.7) | 48.2 (7.6) | 47.5 (5.7) | 2.5 (−0.3 to 5.3) |
| TST>50 CO2 | 5.5 (16.7) | 1.6 (6.6) | 2.7 (8.5) | 7.3 (19.5) | 5.7 (−0.78 to 9.6) |
Abbreviations: AHI, apnea hypopnea index; CAI, central apnea index; CO2, carbon dioxide; REM, rapid eye movement; Sao2, oxygen saturation; Sao2 nadir, lowest pulse oximeter measured hemoglobin saturation; TST>50 CO2, total sleep time at greater than 50 mm Hg blood CO2 saturation.
a
Normal weight, BMI, 5% to 85%; obese, BMI ≥95%; overweight, BMI 85%-95%.
b
Based on ANOVA.