Table 3.

Estimated effect of admit year, patient demographics, and burn characteristics on inpatient mortality.

Patient Characteristics		Hazard Ratioa	95% CI	p-value
Admit year
2004 – 2007		1.21	0.85, 1.73	0.29
2008 – 2010		1.15	0.79, 1.67	0.48
2011 – 2013		ref	-
Gender
Male		0.78	0.57, 1.06	0.11
Female		ref	-
Race/Ethnicity
Caucasian		ref	-
African American		0.78	0.56, 1.09	0.15
Hispanic		1.66	0.79, 3.49	0.18
Other		1.68	1.12, 2.52	0.01
Age, in yearsb
20 years old		ref	-
30 years old		0.86	0. 30, 2.46	0.77
40 years old		1.32	0.60, 2.91	0.49
50 years old		2.64	1.24, 5.63	0.01
60 years old		6.84	3.10, 15.11	<0.0001
70 years old		12.12	5.61, 26.15	<0.0001
Burn mechanism
Flame		ref	-
Scald		0.36	0.18, 0.72	0.004
Contact		0.95	0.40, 2.30	0.91
Other burn		1.53	0.85, 2.76	0.16
TBSAb
0%		ref	-
20%		3.44	1.73, 6.84	0.0004
40%		8.63	4.91, 15.17	<0.0001
60%		19.62	10.79, 35.68	<0.0001
Inhalation injury
Yes		1.53	1.12, 2.09	0.008
No		ref	-

CI=Confidence interval, TBSA= Total burn surface area

^aAll estimates are adjusted for patient and burn characteristics, including gender, race/ethnicity, age, burn mechanism, TBSA, and inhalation injury; stabilized inverse probability of censor weights were used to control differential follow-up/hospitalization time

^bBoth age and TBSA were modeled as continuous variables