Table 2.

Unadjusted Survival and Cost Outcomes

Measure	Total cohort (N=841)	Delirium group (N=109)	Non-delirium group (N=732)	p-value †
Died within 1 year, N (%)	208 (25)	47 (43)	161 (22)	<.001
Days of follow-up
Mean ± SD	313 ± 116	256 ± 157	322 ± 106	0.89
Median	369	369	369
Total health care costs*
Mean ± SD	$50,745 ± $48,113	$69,498 ± $59,120	$47,958 ± $45,640	<.001
Median	$33,295	$56,722	$30,662
Total costs per day survived*
All patients
Mean ± SD	$256 ± $396	$563 ± $774	$211 ± $276	<.001
Median	$140	$322	$117
Patients who died during study period
Mean ± SD	$461 ± $481	$732 ± $773	$382 ± $316	0.004
Median	$332	$471	$287
Patients who survived during entire study period
Mean ± SD	$104 ± $100	$186 ± $122	$95 ± $92	<.001
Median	$66	$159	$60

^*Costs are adjusted for inflation and are reported in 2005 dollars.

^†P-values are for comparison of the delirium and non-delirium groups.