Table 5

Multivariable analysis of LOS for RTI victims included in INTRD, 2000-2004
LOS* β P 95% CI β P 95% CI
Sex Female −0.058 0.00 −0.088 −0.027 −0.052 0.00 −0.081 −0.022
Male** 0 0
Age groups <= 4 −0.056 0.15 −0.133 0.021
5-14 −0.017 0.52 −0.067 0.034
15 - 29 0.005 0.82 −0.042 0.053
30 - 44 0.018 0.46 −0.03 0.066
45 - 59 −0.001 0.98 −0.05 0.048
60+** 0
Education Illiterate 0.157 0.00 0.097 0.218 0.141 0.00 0.085 0.197
Elementary/Intermediate 0.129 0.00 0.074 0.183 0.121 0.00 0.069 0.174
High school 0.057 0.04 0.003 0.111 0.056 0.04 0.002 0.11
University** 0 0
Occupation Retired −0.091 0.01 −0.161 −0.021 −0.082 0.01 −0.145 −0.02
Armed forces −0.045 0.22 −0.117 0.026 −0.038 0.30 −0.108 0.033
White collar worker −0.031 0.12 −0.07 0.008 −0.02 0.28 −0.056 0.016
Blue collar worker 0.031 0.07 −0.002 0.065 0.046 0.00 0.017 0.076
Farmer 0.021 0.53 −0.045 0.087 0.036 0.27 −0.028 0.099
Others** 0 0
Road user type† Pedestrian 0.096 0.00 0.037 0.155 0.1 0.00 0.041 0.158
Car occupant 0.044 0.16 −0.018 0.107 0.048 0.12 −0.013 0.11
Motorcyclist 0.079 0.01 0.019 0.139 0.083 0.01 0.024 0.143
Bicycle rider** 0 0
Medical insurance No −0.108 0.00 −0.13 −0.086 −0.109 0.00 −0.13 −0.087
Yes** 0 0
ISS 1-7 −0.194 0.00 −0.228 −0.16 −0.196 0.00 −0.23 −0.162
8-12 0.022 0.23 −0.014 0.058 0.022 0.23 −0.014 0.058
13+** 0 0
GCS 3-8 0.151 0.00 0.082 0.22 0.151 0.00 0.082 0.219
9-12 0.132 0.00 0.078 0.186 0.133 0.00 0.079 0.186
13-15** 0 0
Died in hospital No 0.603 0.00 0.529 0.676 0.604 0.00 0.531 0.677
Yes** 0 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 = 1154.949 (with d.f. of 6265 and P = 0.184).

**Reference group.

† The group “others” in road user type were not included in the analysis.

Haghparast-Bidgoli et al.

Haghparast-Bidgoli et al. BMC Health Services Research 2013 13:281   doi:10.1186/1472-6963-13-281

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