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
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
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
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.

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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