Table 1.

Patient characteristics and sleep variables of subject patients with PLMD

Gender (M:F)	9:5
Age (yr)	45.9 ± 11.5
Epworth Sleepiness Scale (points)	12.8 ± 4.1
Apnea–hypopnea index (n/hr)	1.7 ± 0.1
Wake after sleep onset (%SPT)	6.1 ± 4.4
Stage 1 (%SPT)	11.7 ± 5.0
Stage 2 (%SPT)	56.9 ± 7.5
Stage 3 + 4 (%SPT)	4.4 ± 5.5
Stage REM (%SPT)	21.0 ± 4.1
Arousal index (n/hr)	13.9 ± 5.3
PLMS index (n/hr)	34.1 ± 14.8
PLMS related arousal index (n/hr)	4.0 ± 2.3
Sleep latency (min)	7.2 ± 8.0
Sleep efficiency (%)	91.7 ± 3.7

Values are expressed as mean ± SD, except for gender distribution.

PLMD, periodic leg movement disorder; SPT, sleep period time; REM, rapid eye movement; PLMS, periodic leg movement during sleep.