Table 1.
Comparisons of demographic and polysomnographic characteristics between the iRBD and control groups.
| Variable | iRBD (n = 47) | Control (n = 26) | P Value |
|---|---|---|---|
| Age | 67.17 ± 6.79 | 67.19 ± 6.41 | .989 |
| Sex (female) | 19 (40.4%) | 12 (46.2%) | .805 |
| TIB, min | 480.93 ± 30.02 | 479.85 ± 23.96 | .875 |
| TST, min | 385.24 ± 48.63 | 378.19 ± 63.31 | .624 |
| Sleep efficiency, % | 80.47 ± 11.11 | 91.34 ± 69.04 | .292 |
| WASO, min | 76.61 ± 51.69 | 91.44 ± 54.19 | .252 |
| Sleep latency, min | 18.49 ± 22.86 | 11.62 ± 11.07 | .154 |
| R latency, min | 125.61 ± 65.82 | 98.29 ± 53.61 | .075 |
| Stage N1, % | 24.65 ± 13.81 | 19.58 ± 9.07 | .097 |
| Stage N2, % | 52.15 ± 12.96 | 56.66 ± 7.63 | .066 |
| Stage N3, % | 4.20 ± 5.77 | 3.77 ± 5.50 | .755 |
| Stage R, % | 18.99 ± 7.76 | 20.00 ± 6.56 | .579 |
| AHI, events/h | 6.89 ± 4.10 | 5.63 ± 3.72 | .202 |
| PLMI, events/h | 26.79 ± 38.89 | 12.37 ± 19.65 | .082 |
| Hypertension | 17 (36.2%) | 6 (22.2%) | .300 |
| Coronary vascular disease | 6 (12.8%) | 2 (7.4%) | .703 |
AHI = apnea-hypopnea index; iRBD = idiopathic rapid eye movement sleep behavior disorder, PLMI = periodic limb movement index, TIB = time in bed, TST = total sleep time, WASO = wake after sleep onset.