Table 2.

Variables associated with non-elective readmission in the year after intensive care unit (ICU) discharge for children without cancer

Variable	Hazard Ratio	95% Confidence Interval	p - value
Reference group: ICU LOS = 1 day	1.00
ICU LOS 2–3 days	1.11	1.07–1.15	<0.001
ICU LOS 4–7 days	1.34	1.28–1.42	<0.001
ICU LOS 8–13 days	1.64	1.53–1.77	<0.001
ICU LOS ≥ 14 day	1.59	1.46–1.74	<0.001
Female	1.08	1.05–1.12	<0.001
Age < 1 year	1.45	1.38–1.53	<0.001
Age 1–4 years	1.03	0.98–1.08	0.205
Age 5–12 years	0.76	0.73–0.80	<0.001
Reference group: Age 13–18 years	1.00
Surgical index ICU admission	0.73	0.70–0.76	<0.001
Underlying comorbidities
Pulmonary/respiratory	1.34	1.29–1.41	<0.001
Neurological	1.72	1.65–1.80	<0.001
Gastrointestinal	1.89	1.77–2.01	<0.001
Immunological	1.32	1.21–1.43	<0.001
Endocrinological	1.25	1.15–1.36	<0.001
Metabolic	1.38	1.27–1.51	<0.001
Hematological	1.16	1.07–1.26	<0.001
Mental disease	1.45	1.37–1.54	<0.001
Cardiac	1.16	1.10–1.21	<0.001
Renal	1.53	1.40–1.68	<0.001
Genitourinary	1.39	1.22–1.58	<0.001
Genetic	1.39	1.30–1.49	<0.001
Acute conditions during index ICU admission
Poisoning	0.78	0.72–0.85	<0.001
Injury	0.53	0.50–0.56	<0.001
Septicemia	1.09	1.01–1.17	0.030
Diabetes with ketoacidosis	1.45	1.31–1.61	<0.001
Diabetes insipidis	1.32	1.05–1.66	0.016
Sickle cell with crisis	3.93	3.30–4.68	<0.001
Status epilepticus	1.19	1.09–1.30	<0.001
Anoxic brain damage	1.22	1.04–1.43	0.017
Conduction disorders	1.08	1.02–1.14	0.005
Pneumonia (bacterial & viral)	1.11	1.06–1.17	<0.001
Acute and chronic respiratory failure	1.35	1.18–1.55	<0.001
Tracheostomy complications	1.47	1.23–1.76	<0.001
Gastrostomy tube complications	1.74	1.45–2.08	<0.001
Acute renal failure	0.89	0.80–0.98	0.025
Device complications	1.59	1.48–1.71	<0.001
Convulsions	1.15	1.08–1.21	<0.001
Feeding difficulties	1.31	1.21–1.41	<0.001
Complications of transplanted organ	2.16	1.85–2.53	<0.001

ICU = intensive care unit; LOS = length of stay

Model Statistics

n	101,762
events	14,144
LR test statistic	6436.6
C-statistic	0.70