Table.

Patient Characteristics

Subjects	17
Age	62 [57–69] years
Sex (female)	11 (65%)
Glasgow Coma Scale score	15 [14–15]
CAM-ICU positive during study period	1 (6%)
Mechanically ventilated	4 (24%)
Any sedatives or sedating analgesics at any time during the study	2 (12%), 1 propofol, 1 propofol + fentanyl
Intercurrent infection during study period	0 (0%)
Interval between illness onset and study initiation	33 [16–50] hours
Daytime hours monitored	16 ± 5 hours
Nighttime hour monitored	17 ± 5 hours
Average daytime light exposure (07:00:00 to 18:59:30)	42 [22–70] lux
Average nighttime light exposure (19:00:00 to 06:59:30)	25 [9–42] lux
Melatonin amplitude	21.6 [10–59.9] pg/mL

Data shown are median [interquartile range]. CAM-ICU: Confusion Assessment Method for the ICU.