APACHE II	Acute Physiology and Chronic Health Evaluation Disease Classification System II
CAM	Confusion Assessment Method
CAM-ICU	Confusion Assessment Method for the intensive care unit
CI	confidence intervals
DSM	Diagnostic and statistical manual of mental disorders
ICDSC	Intensive Care Delirium Screening Check-list
ICU	intensive care unit
IQR	interquartile range
LOS	length of stay
MV	mechanical ventilation
OR	Odds ratio
SSD	subsyndromal delirium