Table 1.

Sleep Characteristics in Subjects with RBD and Controls

Sleep measures	RBD	Controls	P Value
Sleep latency, min	19.6 ± 11.1	21.1 ± 15.9	NS
Total sleep time, min	388.4 ±58.0	404.8 ± 59.1	NS
Wake time after sleep onset, min	73.7 ± 45.4	67.9 ± 52.0	NS
Sleep efficiency, %	83.8 ±10.6	85.6 ±10.8	NS
Stage 1, %	14.7 ± 7.0	11.9 ±7.2	NS
Stage 2, %	62.9 ± 8.3	68.5 ±9.1	NS
Stage 3, %	3.3 ±3.9	2.2 ± 4.2	NS
Stage 4, %	0.02 ± 0.03	0.05 ±0.1	NS
REM sleep, %	19.0 ±7.7	17.4 ±3.7	NS
Microarousal index, no./h	13.4 ±11.6	10.9 ±7.8	NS
Apnea-hypopnea index, no./h	2.4 ±3.8	1.8 ± 2.2	NS
Periodic leg movement index, no./h	22.5 ± 29.1	25.5 ± 23.9	NS

Data are presented as mean ± SD, with P values derived from unpaired t tests. RBD refers to REM (rapid eye movement) sleep behavior disorder