Factors affecting hospital length of stay and hospital charges associated with road traffic-related injuries in Iran

Table 4 Multivariable analysis of total hospital charges for RTI victims included in INTRD, 2000-2004

Total charges*		β	P	95% CI		β	P	95% CI
	LOS	0.08	0.00	0.078	0.082	0.081	0.00	0.079	0.083
Sex	Female	2.85	1.00	−0.03	0.03
Sex	Male**	0
Age groups	<= 4	−0.115	0.00	−0.19	−0.04	−0.113	0.00	−0.184	−0.042
	7-14	−0.093	0.00	−0.143	−0.044	−0.082	0.00	−0.123	−0.042
	15 - 29	−0.007	0.77	−0.053	0.04	−0.012	0.51	−0.047	0.023
	30 - 44	−0.046	0.06	−0.093	0.001	−0.041	0.03	−0.078	−0.003
	45 - 59	−0.026	0.28	−0.074	0.022	−0.021	0.33	−0.064	0.021
	60+**	0				0
Education	Illiterate	0.066	0.03	0.007	0.126
	Elementary/Intermediate	0.088	0.00	0.035	0.141
	High school	0.05	0.07	−0.003	0.102
	University**	0
Occupation	Retired	−0.023	0.51	−0.092	0.045
	Armed forces	−0.018	0.62	−0.088	0.052
	White collar worker	−0.008	0.67	−0.047	0.03
	Blue collar worker	0.021	0.21	−0.012	0.054
	Farmer	0.022	0.50	−0.042	0.087
	Others**	0
Road user type†	Pedestrian	−0.077	0.01	−0.135	−0.02	−0.077	0.01	−0.131	−0.022
	Car occupant	−0.07	0.02	−0.131	−0.009	−0.076	0.01	−0.133	−0.019
	Motorcyclist	−0.039	0.20	−0.098	0.02	−0.038	0.19	−0.094	0.018
	Bicycle rider**	0				0
Medical insurance	No	0.018	0.09	−0.003	0.04
Medical insurance	Yes**	0
ISS	1-7	−0.14	0.00	−0.173	−0.107	−0.134	0.00	−0.165	−0.104
	8-12	0.021	0.24	−0.014	0.056	0.017	0.31	−0.015	0.049
	13+ **	0				0
GCS	3-8	0.117	0.00	0.048	0.185	0.059	0.02	0.01	0.108
	9-12	0.098	0.00	0.045	0.15	0.07	0.00	0.022	0.118
	13-15**	0				0
Died in hospital	No	0.063	0.10	−0.012	0.137
Died in hospital	Yes**	0

RTI: Road traffic injury, INTRD: Iranian National Trauma Registry Database, LOS: length of stay, ISS: Injury Severity Score, GCS: Glasgow Coma Scale.
*Model fitting information (final model): Deviance/chi-Square = 1196.88 (with d.f. of 6978 and P = 0.172).
**Reference group.
†The group “others” in road user type were not included in the analysis.

ISSN: 1472-6963