Table 4.
Correlations between different sleep parameters and clinical features.
| Good sleepers | ||||||||
|---|---|---|---|---|---|---|---|---|
| H-Y stage | UPDRS-III | NMSQ score | PDQ-39 | |||||
| r | p | r | p | r | p | r | p | |
| TST | 0.063 | 0.846 | 0.088 | 0.786 | −0.091 | 0.778 | 0.174 | 0.589 |
| WASO | 0.209 | 0.514 | −0.049 | 0.880 | −0.361 | 0.249 | −0.298 | 0.346 |
| SE | 0.000 | 1.000 | 0.175 | 0.586 | −0.086 | 0.791 | 0.204 | 0.526 |
| SL | 0.000 | 1.000 | −0.221 | 0.491 | 0.264 | 0.406 | 0.021 | 0.948 |
| REML | −0.238 | 0.480 | −0.478 | 0.128 | 0.121 | 0.722 | −0.064 | 0.852 |
| REM Sleep% | 0.042 | 0.897 | 0.530 | 0.058 | −0.007 | 0.982 | 0.119 | 0.712 |
| N1 Sleep % | 0.376 | 0.228 | 0.070 | 0.829 | −0.564 | 0.036 | −0.396 | 0.202 |
| N2 Sleep % | −0.167 | 0.603 | 0.088 | 0.787 | −0.236 | 0.461 | −0.088 | 0.786 |
| N3 Sleep % | −0.168 | 0.603 | −0.309 | 0.329 | 0.564 | 0.056 | 0.446 | 0.146 |
| AHR | −0.376 | 0.228 | −0.553 | 0.062 | −0.472 | 0.077 | −0.533 | 0.074 |
| AHI | −0.021 | 0.948 | 0.268 | 0.399 | −0.268 | 0.399 | −0.308 | 0.331 |
| MAI | 0.125 | 0.698 | 0.680 | 0.015 | 0.043 | 0.895 | 0.270 | 0.396 |
| PLMI | −0.042 | 0.897 | 0.172 | 0.594 | 0.134 | 0.320 | −0.053 | 0.871 |
| Poor sleepers | ||||||||
| H-Y stage | UPDRS-III | NMSQ score | PDQ-39 score | |||||
| r | p | r | p | r | p | r | P | |
| TST | −0.609 | 0.062 | −0.293 | 0.412 | −0.301 | 0.399 | 0.006 | 0.987 |
| WASO | 0.609 | 0.062 | 0.640 | 0.006 | 0.153 | 0.672 | −0.067 | 0.855 |
| SE | −0.609 | 0.062 | −0.524 | 0.120 | −0.129 | 0.723 | −0.067 | 0.855 |
| SL | 0.000 | 1.000 | 0.390 | 0.265 | −0.288 | 0.419 | −0.176 | 0.627 |
| REML | 0.274 | 0.476 | 0.151 | 0.699 | −0.201 | 0.604 | −0.283 | 0.460 |
| REM Sleep% | −0.696 | 0.025 | −0.354 | 0.316 | −0.166 | 0.647 | 0.382 | 0.276 |
| N1 Sleep % | −0.087 | 0.811 | −0.134 | 0.712 | 0.522 | 0.122 | 0.442 | 0.200 |
| N2 Sleep % | 0.348 | 0.324 | 0.317 | 0.372 | −0.313 | 0.379 | −0.685 | 0.029 |
| N3 Sleep % | 0.087 | 0.811 | −0.152 | 0.674 | 0.252 | 0.483 | 0.212 | 0.556 |
| AHR | −0.225 | 0.533 | 0.567 | 0.055 | 0.070 | 0.848 | 0.600 | 0.067 |
| AHI | 0.301 | 0.064 | −0.043 | 0.043 | −0.488 | 0.153 | 0.524 | 0.120 |
| MAI | −0.522 | 0.122 | 0.232 | 0.519 | 0.544 | 0.054 | 0.067 | 0.855 |
| PLMI | 0.435 | 0.209 | 0.134 | 0.712 | 0.644 | 0.014 | 0.164 | 0.651 |
Bold values indicate statistically significant differences (p < 0.05).
H-Y stage, Hoehn–Yahr stage; UPDRS-III, Unified Parkinson's Disease Rating Scale Part III; NMSQ, Non-motor Symptoms Questionnaire; PDQ-39, Parkinson's Disease Questionnaire-39; TST, total sleep time, WASO, wake time after sleep onset, SE, sleep efficiency, SL, sleep latency, REM, rapid eye movement, REML, REM sleep latency, N1 sleep, NREM sleep stage 1, N2 sleep, NREM sleep stage 2, N3 sleep, NREM sleep stage 3, AHR, average heart rate, AHI, apnea–hypopnea index, MAI, micro-arousal index, PLMI, periodic limb movement index.