Table 4.
P-Values from Multilevel Mixed Effects Regression Models for Effect of Sound Character Period on PSG Data
| Outcome | Type III effect p-values | |||||||
|---|---|---|---|---|---|---|---|---|
| Window × AM | Window | AM depth | Study group | Sex | Noise sensitivity | Age | Period number | |
| Sleep time (min) | — | 0.097 | 0.164 | 0.187 | 0.035 | — | — | <0.001 |
| N1% | — | 0.865 | 0.538 | 0.029 | 0.022 | — | — | 0.044 |
| N2% | — | 0.202 | 0.007 | 0.017 | — | — | — | 0.179 |
| N3% | — | 0.413 | 0.131 | — | — | — | — | <0.001 |
| REM% | 0.047 | 0.412 | 0.305 | — | 0.010 | 0.420 | — | <0.001 |
| SSC index | — | 0.815 | 0.781 | 0.305 | 0.019 | — | — | 0.153 |
| Awakening index | 0.002 | 0.969 | 0.858 | — | 0.107 | — | 0.203 | — |
| Arousal index | — | 0.743 | 0.772 | — | 0.072 | — | — | 0.093 |
Data for all outcomes obtained from 48 participants. Statistically significant (<0.05) p-values are highlighted with bold typeface. Empty cells indicate that the covariate or interaction was not statistically significant and did not contribute to the model and was therefore not included.