Table 1.

Demographic and polysomnographic measures in participants with rapid eye movement sleep behaviour disorder (RBD).

	Participants with RBD
Number	20
Sex, female No. (%)	3 (15)
Idiopathic RBD, No. (%)	15 (75)
Parkinson’s disease, No. (%)	5 (25)
Age, years	65.1 ± 6.8
Total sleep time (TST), min	421.9 ± 80.2
Total sleep period (TSP), min	493.5 ± 91.8
Sleep efficiency (TST/TSP), %	85.7 ± 6.6
Sleep onset latency, min	22.1 ± 15.9
REM sleep latency, min	131.9 ± 78.8
Sleep stages, min (% of TST)
NREM sleep stage N1	12.5 ± 6 (3.1 ± 1.8)
NREM sleep stage N2	206 ± 81 (48 ± 14.7)
NREM sleep stage N3	96.4 ± 42 (24 ± 11.3)
REM sleep	97.9 ± 45.6 (23.2 ± 9.5)
Arousals/hour of sleep	10.9 ± 7.8
Periodic leg movements/ hour of sleep	17.7 ± 24.3
Apnoea-hypopnea/hour of sleep	5.7 ± 7.6
REM sleep without atonia, % of REM sleep	65.7 ± 20.4

RBD rapid eye movement sleep behaviour disorder, NREM non rapid eye movement sleep.