Table 2.

Sleep Parameters

Parameter	Placebo	Desipramine	P Value
TST, min	292.5 (260.3–347.0)	320.5 (278.3–366.5)	0.375
SE, %	64.8 (58.9–78.9)	78.1 (68.5–84.9)	0.065
NREM1, % TST	17.2 (10.8–23.4)	21.2 (16.2–27.4)	0.254
NREM2, % TST	54.0 (46.8–64.7)	60.9 (53.7–70.8)	0.084
NREM3, % TST	12.1 (9.9–18.0)	8.0 (3.7–14.9)	0.131
REM, % TST	11.5 (6.7–15.3)	1.0 (0.0–3.1)	0.071
AHI, events/h	0.0 (0–0)	0.0 (0–0)	0.999
ArI, events/h	17.0 (12.6–23.4)	20.1 (11.8–23.5)	0.275

Definition of abbreviations: AHI = apnea–hypopnea index; ArI = arousal index; NREM1 = non-REM sleep stage 1; NREM2 = non-REM sleep stage 2; NREM3 = non-REM sleep stage 3; SE = sleep efficiency; TST = total sleep time.

Data are expressed as median (25th–75th percentile).