Pre-imputation				Post-imputation for missing data
Risk factor	AOR	95%CI		p-value	AOR	95%CI		p-value
Acute non-stroke neurological event	0.70	0.28	1.71	0.428	0.79	0.38	1.63	0.519
Baseline depression in neurological status	0.79	0.38	1.64	0.526	0.95	0.55	1.63	0.847
Congestive heart failure during admission	0.50	0.25	1.00	0.05	0.58	0.32	1.05	0.072
Hepatic insufficiency	0.62	0.24	1.56	0.308	0.73	0.33	1.62	0.435
Hypotension/hypoperfusion	0.31	0.20	0.47	<0.001	0.34	0.24	0.50	<0.001
Metastatic or hematological malignancy	0.33	0.17	0.62	0.001	0.48	0.29	0.78	0.003
Metabolic and electrolyte abnormality	1.18	0.51	2.71	0.696	0.74	0.36	1.53	0.414
Renal insufficiency	0.77	0.49	1.24	0.284	0.84	0.57	1.24	0.387
Respiratory failure	0.87	0.57	1.34	0.534	1.01	0.71	1.44	0.952
Septicemia	0.31	0.12	0.77	0.012	0.39	0.19	0.80	0.01
Active or evolving myocardial infarction	0.57	0.23	1.43	0.229	0.57	0.23	1.40	0.22
Inadequate natural airway	3.36	0.72	15.72	0.124	3.02	0.92	9.85	0.068
Arrhythmia	1.65	1.17	2.33	0.004	1.60	1.18	2.18	0.003
Day hours	2.31	1.34	3.97	0.003	2.22	1.37	3.59	0.001
Event location
Operating room	2.52	1.13	5.63	0.024	1.38	1.02	2.58	0.047
PACU	3.36	1.39	8.13	0.007	2.04	1.02	4.09	0.044
Telemetry	0.57	0.13	2.40	0.442	0.59	0.14	2.39	0.456
ICU	0.99	0.39	2.49	0.979	0.60	0.26	1.38	0.228
Weekend	0.54	0.32	0.94	0.028	0.49	0.30	0.79	0.003
Invasive ventilation in place pre-arrest	0.17	0.07	0.40	<0.001	0.41	0.25	0.67	<0.001
White vs. non-white	1.35	0.80	2.28	0.264	1.18	0.79	1.75	0.427
Illness Category
Medical cardiac	1.78	0.68	4.69	0.24	1.44	0.61	3.41	0.411
Surgical cardiac	1.03	0.44	2.40	0.947	1.62	0.80	3.29	0.183
Surgical non cardiac	1.88	0.93	3.79	0.078	1.78	1.03	3.08	0.038
Trauma	0.25	0.07	0.93	0.039	0.46	0.17	1.26	0.13
Age at hospital admission	0.98	0.97	0.99	0.003	0.98	0.97	0.99	<0.001
Duration of event	0.95	0.93	0.97	<0.001	0.95	0.93	0.96	<0.001

AOR adjusted odds ratio, CI confidence intervals, ICU Intensive Care Unit areas, PACU Post Anesthesia Care Unit.