Table 4

Adjusted IDR for the association between crash and environment related variables and the risk of death in the first 24 hours after a road crash, Spain, 1993–2013

VariableCategoryIDR95% CIP valueFMI
Type of crashCollision with a moving vehicle*1
Other0.890.78 to 1.000.0560.013
Traffic lane characteristicsIntersection*1
Other1.651.46 to 1.87<0.0010.007
AreaHighway*1
Urban area0.180.16 to 0.21<0.0010.016
Community road0.610.48<0.0010.002
Meteorological conditionsGood weather*1
Any adverse circumstances1.361.07 to 1.720.0110.005
Road surfaceNormal*1
Any adverse circumstances0.750.59 to 0.960.0220.006
Time of day (24 hours clock)0:00–2:59*1
3:00–5:591.581.03 to 2.410.0360.010
6:00–8:590.780.54 to 1.110.1650.013
9:00–11:590.460.33 to 0.64<0.0010.015
12:00–14:590.400.29 to 0.56<0.0010.015
15:00–17:590.450.32 to 0.63<0.0010.013
18:00–20:590.490.35 to 0.68<0.0010.013
21:00–23:590.610.43 to 0.870.0060.013
Years2011–2013*1
2008–20101.341.07 to 1.680.0110.012
2005–20072.111.71 to 2.61<0.0010.015
2002–20042.161.75 to 2.67<0.0010.012
1999–20012.421.97 to 2.99<0.0010.011
1996–19982.301.86 to 2.84<0.0010.012
1993–19952.672.17 to 3.28<0.0010.015
  • *Reference category.

  • FMI, fraction of missing information; IDR, incidence density ratio.