Table 2.
Number and percentage of Parkinson’s disease (PD) and healthy controls (HCs) reporting the presence of insomnia and excessive daytime sleepiness across a 5-year period with between-group comparisons made between the PD and HCs
| Time point | Presence of insomnia symptoms | Presence of excessive daytime sleepiness | Presence of REM sleep behavior disorder | |||||
|---|---|---|---|---|---|---|---|---|
| PD | HCs | p value* | PD | HCs | p value* | PD | HCs | |
| Baseline | 45 (20.6) | 15 (14.7) | 0.223 | 37 (17) | 9 (8.8) | 0.060 | 46 (21.1) | NA |
| 2 years | 64 (31.5) | 21 (21) | 0.058 | 47 (23.3) | 11 (11) | 0.013 | 59 (29.1) | NA |
| 3 years | 73 (34.4) | 20 (20.6) | 0.016 | 59 (27.8) | 11 (11.2) | 0.001 | 68 (32.2) | NA |
| 4 years | 90 (42.7) | 17 (17.4) | 0.001 | 60 (28.6) | 13 (13.3) | 0.004 | 67 (31.9) | NA |
| 5 years | 97 (44.5) | 18 (17.7) | 0.001 | 70 (32.1) | 10 (9.8) | 0.001 | 68 (31.2) | NA |
NA not applicable
*Chi-square test. Significant differences highlighted in bold