Table 3.
Neuropsychiatric characteristics of iRBD, PD + RBD, PD-RBD and HC groups.
| Variables | iRBD | PD + RBD | PD-RBD | HC | F-value | df | P-value | Cohen’s f | post-hoc *** | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (n = 38) | (n = 38) | (n = 38) | (n = 38) | iRBD vs. HC (Cohen’s f) |
iRBD vs. PD + RBD (Cohen’s f) |
iRBD vs. PD-RBD (Cohen’s f) |
HC vs. PD + RBD (Cohen’s f) |
HC vs. PD-RBD (Cohen’s f) |
PD + RBD vs. PD-RBD (Cohen’s f) |
|||||
| HARS | 11.42 ± 5.12 | 9.05 ± 5.07 | 8.71 ± 6.41 | 4.10 ± 3.94 | 13.114 | 3 | < 0.0001 * | 0.5089 | < 0.0001 ** (0.4968) |
0.0493 | 0.0247 | < 0.0001 ** (0.3360) |
0.0002 ** (0.3129) |
0.7750 |
| TAS-20 | 50.55 ± 13.84 | 46.87 ± 11.27 | 47.34 ± 12.07 | 40.76 ± 10.17 | 4.474 | 3 | 0.0049 * | 0.2972 | 0.0005 ** (0.2906) |
0.1797 | 0.2420 | 0.0270 | 0.0173 | 0.8626 |
| TAS-20 F1 | 14.97 ± 5.79 | 12.32 ± 5.16 | 13.29 ± 6.37 | 9.79 ± 3.06 | 6.491 | 3 | 0.0004 * | 0.3575 | < 0.0001 ** (0.3491) |
0.0287 | 0.1636 | 0.0374 | 0.004 ** (0.2359) |
0.4196 |
| TAS-20 F2 | 14.10 ± 6.11 | 13.71 ± 5.70 | 14.05 ± 5.93 | 11.76 ± 5.14 | 1.426 | 3 | 0.2377 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| TAS-20 F3 | 21.47 ± 5.97 | 20.84 ± 5.01 | 20 ± 5.91 | 19.21 ± 5.19 | 1.207 | 3 | 0.3092 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| ARS | 11.24 ± 7.77 | 7.32 ± 5.55 | 7.90 ± 6.42 | 5.24 ± 4.73 | 6.081 | 3 | 0.0006 * | 0.3464 | < 0.0001 ** (0.3411) |
0.0067 ** (0.2228) |
0.0205 | 0.1472 | 0.0644 | 0.6855 |
| SHAPS | 0.32 ± 0.78 | 0.29 ± 0.57 | 0.40 ± 0.68 | 0.24 ± 0.43 | 0.420 | 3 | 0.7390 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. |
| BDI Total score | 10.37 ± 7.99 | 8.92 ± 5.76 | 8.82 ± 6.40 | 4.32 ± 4.69 | 6.543 | 3 | 0.0003 * | 0.3591 | < 0.0001 ** (0.3382) |
0.3200 | 0.2862 | 0.0018 ** (0.2572) |
0.0023 ** (0.2516) |
0.9423 |
Data represent mean ± SD (Mean Rank ± Standard Deviation); iRBD = idiophatic rapid eye movement REM sleep behavior disorder; iRBD = idiopathic RBD; PD = Parkinson’s disease; HC = healthy comparators; HARS = Hamilton Anxiety Rating Scale; TAS-20 = Toronto Alexithymia Scale—20 item; TAS-20 F1 = difficulty identifying feelings; TAS-20 F2 = difficulty describing feelings; TAS-20 F3 = externally oriented thinking; ARS = Apathy Rating Scale; SHAPS = Snaith Hamilton Pleasure Scale; BDI = Beck Depression Inventory; * Significant at p < 0.01; ** Significant at p < 0.008; and *** Tukey’s HSD analysis replicates exactly the results of Fisher’s LSD test Bonferroni corrected shown here. Statistical parameters available upon request.