Table 3.
Comparison of arousal indices between the participants with and without MCI.
| Arousal Variable (Events/h) | Non-MCI Group (n = 31) | MCI Group (n = 37) | P |
|---|---|---|---|
| ArI | 20.26 ± 9.66 | 23.19 ± 9.89 | .11 |
| ArINREM | 20.30 ± 10.40 | 23.91 ± 10.52 | .08 |
| ArIREMa | 23.23 ± 25.48 | 19.97 ± 16.88 | .45 |
| SpArI | 8.43 ± 4.48 | 11.94 ± 7.30 | < .05 |
| SpArINREM | 8.56 ± 4.70 | 12.46 ± 8.03 | < .05 |
| SpArIREMa | 6.35 ± 7.13 | 10.18 ± 10.89 | .07 |
| RArI | 10.14 ± 9.57 | 9.51 ± 8.99 | .78 |
| RArINREM | 10.10 ± 9.99 | 9.61 ± 9.27 | .84 |
| RArIREMa | 10.92 ± 14.13 | 11.31 ± 14.63 | .36 |
| SnArI | 0.30 ± 0.9 | 0.09 ± 0.31 | .65 |
| SnArINREM | 0.23 ± 0.78 | 0.09 ± 0.34 | .73 |
| SnArIREMa | 1.06 ± 3.67 | 0.08 ± 0.34 | .41 |
| LArI | 1.32 ± 1.29 | 1.52 ± 1.42 | .66 |
| LArINREM | 1.35 ± 1.40 | 1.62 ± 1.60 | .57 |
| LArIREMa | 4.69 ± 21.46 | 0.58 ± 1.31 | .22 |
Data are expressed as mean ± SD. Differences between groups were all assessed using the Mann-Whitney U test. aTwo participants with MCI did not have a REM stage during the polysomnography. ArI = arousal index, ArINREM = arousal index in the non–rapid eye movement stage, ArIREM = arousal index in the rapid eye movement stage, LArI = limb movement arousal index, LArINREM = limb movement arousal index in the non–rapid eye movement stage, LArIREM = limb movement arousal index in the rapid eye movement stage, MCI = mild cognitive impairment, RArI = respiratory arousal index, RArINREM = respiratory arousal index in the non–rapid eye movement stage, RArIREM = respiratory arousal index in the rapid eye movement stage, REM = rapid eye movement, SnArI = snore arousal index, SnArINREM = snore arousal index in the non–rapid eye movement stage, SnArIREM = snore arousal index in the rapid eye movement stage, SpArI = spontaneous arousal index, SpArINREM = spontaneous arousal index in the non–rapid eye movement stage, SpArIREM = spontaneous arousal index in the rapid eye movement stage.