Effect of Exogenous Melatonin Administration in Critically Ill Patients on Delirium and Sleep: A Randomized Controlled Trial

Table 2

Epidemiologic and environmental characteristics of the studied cohort.

Parameters	Group A	Group B	Total	P
	Melatonin	Placebo
	N = 21	N = 12	N = 33
	Median (IQR)	Median (IQR)	Median (IQR)
Age (years)	55 (43–66)	57.5 (50–64)	55 (49–66)	0.50
APACHE II	22 (12–30)	24 (14–28)	22 (14–29)	0.81
APACHE III	74 (53–94)	78 (47–101)	74 (53–94)	0.90
ICU length of stay (days)	24 (16–36)	23 (16–35)	23 (16–36)	0.71
Study ICU enrollment day	8 (6–15)	10 (3–14)	10 (3–14)	0.62
Light intensity (lux)N = 14	50 (25–60)	50 (30–65)	50 (25–63)	0.69
Sound intensity (dB)N = 14	60 (50–62)	65 (65–70)	62 (50–65)	0.12

lux, luxes; dB, decibels.