TABLE 3.

Unadjusted Analysis Comparing Relative Risk of Unplanned ICU Readmission Associated With Potential Risk Factors in Cohorts of Adult and Elderly Patients

Potential Risk Factor	RR of UIR Among All Patients	RR of UIR Among Adult Patients	RR of UIR Among Elderly Patients
Preexisting medical condition
Myocardial infarction	1.29 (1.04–1.61)	1.23 (0.72–2.11)	1.11 (0.87–1.41)
Congestive heart failure	1.61 (1.39–1.86)	2.11 (1.42–3.13)	1.27 (1.08–1.48)
Peripheral vascular disease	1.99 (1.59–2.50)	2.58 (1.31–4.71)	1.59 (1.24–2.03)
Stroke	1.27 (1.09–1.50)	1.46 (0.97–2.19)	1.02 (0.86–1.22)
Dementia	0.99 (0.85–1.16)	1.45 (0.61–3.42)	0.75 (0.64–0.89)
Chronic obstructive pulmonary disease	1.52 (1.35–1.70)	1.28 (1.03–1.58)	1.50 (1.31–1.72)
Peptic ulcer disease	1.31 (0.86–1.99)	2.15 (1.09–4.23)	0.93 (0.54–1.58)
Cirrhosis	1.79 (1.39–2.29)	2.43 (1.76–3.36)	1.41 (0.96–2.09)
Diabetes mellitus	1.36 (1.23–1.51)	1.40 (1.13–1.72)	1.14 (1.01–1.29)
Chronic kidney disease	2.18 (1.81–2.64)	1.75 (1.11–2.76)	2.01 (1.63–2.48)
Malignancy	1.22 (0.91–1.63)	1.96 (1.10–3.50)	0.91 (0.66–1.28)
AIDS	0.87 (0.46–1.66)	1.15 (0.58–2.28)	0.84 (0.12–5.74)
Severely injured body region
Head	1.04 (0.95–1.14)	1.16 (0.99–1.34)	0.91 (0.81–1.02)
Face	1.25 (0.72–2.17)	1.39 (0.70–2.75)	1.68 (0.66–4.32)
Neck	0.59 (0.30–1.18)	0.50 (0.19–1.33)	1.12 (0.43–2.92)
Chest	1.61 (1.46–1.77)	1.96 (1.69–2.28)	1.54 (1.36–1.74)
Abdomen	1,19 (0.98–1.45)	1.31 (1.02–1.67)	1.92 (1.37–2.68)
Spine	1.25 (1.07–1.45)	1.48 (1.17–1.88)	1.09 (0.89–1.32)
Upper extremity	1.00 (0.51–1.98)	1.18 (0.53–2.60)	1.40 (0.37–5.36)
Lower extremity	1.33 (1.14–1.56)	1.46 (1.16–1.84)	1.39 (1.12–1.74)

RR = relative risk, UIR = unplanned ICU readmission.

Results in bold have 95% CIs that do not 1, and thus are considered to represent statistically significant associations.