TABLE 1.
Night Time Polysomnography Among 228 Matched Children (Means, Standard Deviations and Percentages)
| Non-Snoring Controls (1) | Habitual Snoring (2) | Obstructive Sleep Apnea (3) | ANOVA | p-value | Tukey HSD Post Hoc | |
|---|---|---|---|---|---|---|
| TST (min) | 476.11 (35.27) | 486.37 (37.86) | 480.68 (42.98) | F(2,225)=1.33 | p=.266 | NS |
| Sleep efficiency (%) | 90.66 (6.23) | 90.39 (8.71) | 91.10 (7.21) | F(2,225)=.173 | p=.841 | NS |
| Sleep latency (min) | 21.85 (22.23) | 17.98 (16.85) | 15.87 (14.97) | F(2,225)=2.09 | p=.120 | NS |
| REM latency (min) | 142.09 (56.60) | 140.18 (57.13) | 154.61 (65.67) | F(2,225)=1.3 | p=.275 | NS |
| Stage 1 (% TST) | 6.07 (4.58) | 8.01 (8.13) | 8.04 (6.68) | F(2,225)=2.19 | p=.114 | NS |
| Stage 2 (% TST) | 45.94 (8.40) | 45.37 (7.39) | 44.21 (7.70) | F(2,225)=.948 | p=.389 | NS |
| Stage 3+4 (% TST) | 25.90 (8.29) | 25.89 (6.68) | 27.82 (29.84) | F(2,225)=.282 | p=.755 | NS |
| REM Sleep (% TST) | 21.15 (4.94) | 21.30 (8.09) | 22.88 (16.72) | F(2,225)=.569 | P=.567 | NS |
| SAI (%/hrTST) | 7.26 (3.44) | 7.42 (3.62) | 6.22 (4.69) | F(2,225)=2.06 | p=.129 | NS |
| RAI (%/hrTST) | .53 (.78) | 1.66 (3.48) | 7.26 (5.00) | F(2,225)=78.51 | p=.000 | 1>3 (p=.000) 2>3 (p=.000) |
| RDI (%/hrTST) | .92 (1.14) | 1.09 (1.32) | 9.92 (9.99) | F(2,225)=58.77 | p=.000 | 1>3 (p=.000) 2>3 (p=.000) |
| OAI (%/hrTST) | .08 (.20) | .20 (.51) | 1.85 (2.66) | F(2,222)=29.56 | p=.000 | 1>3 (p=.000) 2>3 (p=.000) |
| SpO2 Nadir (%) | 92.67 (3.92) | 92.20 (2.97) | 82.62 (8.42) | F(2,221)=75.55 | p=.000 | 1>3 (p=.000) 2>3 (p=.000) |
| Mean SpO2 (%) | 97.50 (1.16) | 97.52 (1.11) | 95.87 (4.38) | F(2,225)=9.32 | p=.000 | 1>3 (p=.001) 2>3 (p=.001) |
Note. Standard deviations presented in parentheses. NS=non significant; TST = total sleep time; REM – rapid eye movement; SAI = spontaneous arousal index; RAI = respiratory arousal index; RDI = respiratory disturbance index; OAI – obstructive apnea index; SpO2– oxygen saturation measured by pulse oximetry