Table 2.

Multivariable analysis of factors associated with documented CAM-ICU assessments and inappropriate “unable to assess” responses

	Documented CAM-ICU			IUTA response
Factor	Odds ratioa	95% CI	P	Odds ratioa	95% CI	P
Patient related
Age, y
<65	Reference			Reference
65–80	0.95	0.88–1.02	.16	1.28	0.99–1.65	.06
>80	0.96	0.87–1.06	.46	1.72	1.25–2.35	.001
Sex
Male	Reference			Reference
Female	1.06	0.99–1.13	.09	1.19	0.94–1.51	.16
Primary language
English	Reference			Reference
Spanish	1.09	0.95–1.24	.22	0.48	0.27–0.87	.02
Other	0.94	0.83–1.06	.31	1.49	0.94–2.37	.12
Ethnicity
Non-Hispanic	Reference			Reference
Hispanic	1.00	0.91–1.10	>.99	1.44	0.99–2.11	.06
Race
White	Reference			Reference
Non-White	0.95	0.88–1.01	.11	1.46b	1.13–1.89	.005
Clinical
Admission diagnosis category
Respiratory	Reference			Reference
Sepsis	1.04	0.93–1.16	.53	2.37	1.55–3.64	<.001
Other	0.90	0.81–1.00	.05	1.32	0.87–2.02	.18
Not intubated	Reference			Reference
Intubated	1.06	0.97–1.15	.20	2.18	1.74–2.74	<.001
Not requiring physical restraints	Reference			Reference
Physical restraints	1.20	1.09–1.32	<.001	2.15	1.64–2.82	<.001
No propofol infusion	Reference			Reference
Propofol infusionb	1.14	0.99–1.30	.06	1.93	1.41–2.64	<.001
No midazolam infusion	Reference			Reference
Midazolam infusionb	0.90	0.76–1.05	.17	1.82	1.05–3.16	.04
No dexmedetomidine infusion	Reference			Reference
Dexmedetomidine infusionb	1.38	1.18–1.62	<.001	1.69	1.12–2.56	.01
No fentanyl infusion	Reference			Reference
Fentanyl infusionb	0.92	0.81–1.04	.18	1.98	1.50–2.62	<.001
Workplace
Day shift	Reference			Reference
Night shift	0.86	0.81–0.91	<.001	0.99	0.93–1.06	.89
Side A	Reference			Reference
Side B	1.38	1.30–1.48	<.001	0.78	0.60–1.01	.07
Weekend	Reference			Reference
Weekday	1.02	0.97–1.08	.44	0.91	0.84–0.99	.04
Not July	Reference			Reference	Reference
July	1.06	0.94–1.19	.32	0.51	0.22–1.18	.11

Abbreviations: CAM-ICU, Confusion Assessment Method for the Intensive Care Unit; IUTA, inappropriate “unable to assess.”

^aCalculated by using multivariable logistic regression, with generalized estimating equations to account for repeated time-varying measures (eg, CAM-ICU). For patients admitted multiple times during the data collection period, we confined our analysis to each patient’s first admission. Variance inflation factors were used to evaluate for multicollinearity; none was detected. Higher documentation and inappropriate “unable to assess” response odds ratios represent factors associated with a greater odds of completion of CAM-ICU documentation or inappropriate “unable to assess” scores, respectively.

^bAdministered at any time during a 12-hour CAM-ICU documentation period.