Table 1.

Variables, Measures, and Measurement Schedule for Patient Characteristics

Variables	Measures	Inter-rater Reliability	Observation Session
			Baseline	1	2	3	4
Delirium	Confusion Assessment Method for ICU (CAM-ICU)	.96*1	*	*	*	*	*
Level of Consciousness	Glasgow Coma Scale (GCS)	.64*2	*	*	*	*	*
Severity of Illness	Acute Physiology and Chronic Health Evaluation (APACHE III)	.90+3	*	*	*	*	*
Days Intubated Prior to Enrollment	Days intubation prior to enrollment (in days)	-	*

^*Cohen’s Kappa Coefficient,

⁺Intra-class Correlation Coefficient

Note: References for inter-rater reliability statistics:

¹(Ely, Inouye, et al., 2001),

²(Ely et al., 2003),

³(Knaus et al., 1991)