Long-term outcomes and clinical predictors of hospital mortality in very long stay intensive care unit patients: a cohort study

Table 2 Intensive care unit course

Characteristic	Survivors (n = 106)	Nonsurvivors (n = 76)	P
Number of ICU readmissions
0	76 (72%)	47 (63%)	0.07^a
1	24 (23%)	17 (23%)
2	2 (2%)	6 (8%)
>2	3 (3%)	4 (6%)
Total duration of ICU stay (days)
Median	48	54	0.14^b
Interquartile range	35–70	36–96
Requiring ventilation	106 (100%)	75 (99%)	0.42^c
Total duration of ventilation (days)
Median	39	46	0.002^d
Interquartile range	29–53	34–86
Requiring inotropes/vasopressors at any time in the ICU	65 (61%)	64 (84%)	0.0008
Requiring inotropes/vasopressors for at least 3 days at or after day 30	8/103 (8%)	26/70 (37%)	<0.0001
ARF requiring dialysis at any time in ICU (excluding ESRD)	6 (6%)	23/75 (30%)	<0.0001
ARF requiring dialysis at or after day 30 (excluding ESRD)	5 (5%)	22/75 (29%)	<0.0001

Values are expressed as n (%) except where noted otherwise. ^aP = 0.02 using χ² test comparing patients with 0–1 readmissions versus patients with >1 readmissions (also see Figure 3). ^bP value obtained using Wilcoxon Rank Sum test; P = 0.02 using χ² test comparing patients requiring <90 days of ICU care versus patient requiring >90 days of ICU care (also see Figure 1). ^cP value obtained using Fisher's exact test. ^dP value obtained using Wilcoxon rank sum test; P = 0.007 using χ² test comparing patients requiring <90 days of ventilation versus patient requiring >90 days of ventilation (also see Figure 2). ARF, acute renal failure; ESRD, end-stage renal disease; ICU, intensive care unit.

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