Table 2.
Mean Total ASDA Arousals, Arousal Index, and Arousals Corrected for Arousals Associated With Limb Movements and Apnea
| Parameter | Age Group, y | F value | Difference | |||||
|---|---|---|---|---|---|---|---|---|
| 18–20 | 21–30 | 31–40 | 41–50 | 51–60 | 61–70 | |||
| EEG Arousals | 80 ± 27 | 83 ± 33 | 116 ± 44 | 109 ± 29 | 128 ± 40 | 130 ± 42 | 4.43* | e |
| AI | 10.6 ± 4.0 | 10.8 ± 4.6 | 16.8 ± 6.2 | 16.5 ± 5.6 | 21.9 ± 8.9 | 21.9 ± 6.8 | 8.15* | a |
| TST, min | 439 | 446 | 403 | 395 | 358 | 350 | 13.4* | a |
| Sleep stage, % of TST | ||||||||
| 1 | 7 | 9 | 12 | 14 | 16 | 16 | 3.98* | b |
| 2 | 52 | 54 | 52 | 50 | 45 | 46 | 2.35* | g |
| SWS | 19 | 13 | 7 | 7 | 3 | 3 | 11.6* | c |
| REM | 18 | 19 | 18 | 14 | 17 | 15 | 1.76 | |
| Awakenings, no. | 21.5 | 22.9 | 29.8 | 34.7 | 43.3 | 42 | 6.88* | f |
| TIB, min | 480 | 480 | 480 | 480 | 465 | 456 | 2.48* | None differ |
| SE, % | 95.1 | 94.6 | 88.0 | 85.3 | 79.2 | 80.7 | 16.4* | a |
| REM latency | 108 | 125 | 114 | 103 | 84.5 | 114 | 1.13 | |
| Leg Index | 4 | 3 | 7 | 7 | 4 | 2 | 0.68 | |
| Leg AI | 0.8 | 0.8 | 1.4 | 1.8 | 0.4 | 1.6 | 1.69 | |
| Apnea Index | 0 | 0 | 0 | 0.7 | 1.3 | 1.8 | 0.76 | |
| Apnea AI | 0 | 0 | 0 | 0.3 | 0.5 | 0.2 | NS | |
| Final AI | 9.8 | 10.1 | 16.0 | 14.9 | 16.2 | 21.2 | 6.06* | d |
ASDA refers to American Sleep Disorders Association; EEG, electroencephalogram; AI, arousal index; TST, total sleep time; SWS, slow-wave sleep; TIB, time in bed; SE, sleep efficiency; REM, rapid eye movement sleep;
a: 18 = 20 < 30 = 40 < 50 = 60;
b: 18 < 40 = 50 = 60; 20 < 60;
c: 18 > 20 > 30 = 40 = 50 = 60
d: 18 = 20 < 30 = 40 = 50 < 60;
e: 18 = 20 < 50 = 60;
f: 18 = 20 = 30 < 50 = 60
g: 20 > 50