Table 2.

Distributions and statistical tests of association of characteristics for Burn Model System participants discharged alive, consented and 18-year-old or older participants lost to follow-up

	6 Months				12 Months				24 Months
	Followed	Lost	% Lost	P-value	Followed	Lost	% Lost	P-value	Followed	Lost	% Lost	P-value
Number of eligible participants	2040				1954				1784
Overall sample follow-up status	1508	532	26%		1302	652	33%		1029	755	42%
Participants lost to follow-up by site
Site 1	521	164	24%	<.001	448	209	32%	<.001	353	241	41%	<.001
Site 2	632	121	16%		549	176	24%		420	251	37%
Site 3	184	197	52%		164	213	57%		156	219	58%
Site 4	171	50	23%		141	54	28%		100	44	31%
Ethnicity
White	1011	323	24%	.001	871	410	32%	.023	696	476	41%	.112
Black	198	103	34%		174	117	40%		138	130	49%
Hispanic	208	56	21%		177	72	29%		135	90	40%
Other	80	31	28%		72	32	31%		54	41	43%
Sex
Male	1068	391	27%	.24	916	489	35%	.031	722	562	44%	.047
Female	440	141	24%		386	163	30%		307	193	39%
Employed at time of burn
No	531	198	27%	.032	444	256	37%	.002	340	301	47%	<.001
Yes	962	285	23%		841	355	30%		676	415	38%
History alcohol abuse
No	1274	379	23%	.004	1107	478	30%	.001	882	574	39%	.001
Yes	188	84	31%		156	105	40%		114	119	51%
History drug abuse
No	1309	381	23%	<.001	1139	480	30%	<.001	916	566	38%	<.001
Yes	142	77	35%		116	97	46%		77	116	60%
Non-intentional injury
No	90	40	31%	.104	80	43	35%	.502	64	50	44%	.571
Yes	1394	450	24%		1201	566	32%		945	661	41%
Job-related injury
No	1133	399	26%	.019	968	493	34%	.009	747	576	44%	.001
Yes	351	91	21%		313	116	27%		262	135	34%
Where living at release
Other	435	163	27%	.138	366	201	35%	.07	298	228	43%	.374
Personal residence	1045	332	24%		911	413	31%		705	491	41%
Who living with at release
Alone	156	60	28%	.005	125	78	38%	<.001	102	79	44%	<.001
Spouse/partner	630	164	21%		587	194	25%		480	261	35%
Other	625	231	27%		509	295	37%		380	330	46%
Primary sponsor of care (i.e., insurance)
Private, HMO, PPO, VA, and Champus	487	114	19%	<.001	420	162	28%	<.001	336	190	36%	<.001
Medicaid, self-pay, indigent, philanthropy	498	230	32%		412	283	41%		315	317	50%
Medicare	220	70	24%		197	72	27%		145	94	39%
Workers compensation	248	50	17%		227	59	21%		187	81	30%
Followed at 6 months
No					113	388	77%	<.001	102	362	78%	<.001
Yes					1189	264	18%		927	393	30%
Followed at 12 months
No									109	481	82%	<.001
Yes									920	274	23%
Mean TBSA burned (%)	19.2	16.3		<.001	20.3	15.1		<.001	20.3	16.6		<.001
Mean age at follow-up (years)	44.5	42.4		.003	45.6	41.8		<.001	46.6	43.0		<.001
Length of acute hospital stay (days)	30.8	29.9		<.001	33.5	25.1		<.001	34.0	27.0		<.001

HMO: Health Maintenance Organization; PPO: Preferred Provider Organization; VA: Veterans Administration.