Bulletin of the World Health Organization

Road injuries and relaxed licensing requirements for driving light motorcycles in Spain: a time-series analysis

Katherine Pérez, Marc Marí-Dell’Olmo, Carme Borrell, Manel Nebot, Joan R Villalbí, Elena Santamariña & Aurelio Tobias

Volume 87, Number 7, July 2009, 497-504

Table 2. Relative risk of being injured on the road, and attributable fraction, since the passing of law allowing experienced car drivers to drive light motorcycles, by type of vehicle, Barcelona, Spain, 1 January 2002 to 30 April 2008

Period Motorcycle
Moped
Car
Light (EC 51–125 cc)
Heavy (EC > 125 cc)
(EC  50 cc)
RRa (95% CI) AF % No. RRa (95% CI) AF % No. RRa (95% CI) AF % No. RRa (95% CI) AF % No.
Entire post-law period 1.46 (1.34–1.60) 32 2 091 1.15 (1.02–1.29) 13 682 0.92 (0.83–1.01) –9 –654 1.06 (0.97–1.16) 6 676
1 year after law 1.18 (1.07–1.29) 15 226 1.19 (1.09–1.42) 16 216 0.96 (0.86–1.07) –4 –94 1.03 (0.93–1.14) 3 111
2 years after law 1.38 (1.26–1.50) 28 477 1.31 (1.20–1.42) 24 352 0.90 (0.78–1.04) –11 –225 1.01 (0.88–1.15) 1 34
3 years after law 1.68 (1.55–1.83) 40 858 1.31 (1.20–1.42) 24 352 0.93 (0.78–1.12) –8 –151 1.00 (0.84–1.19) –1 –32
3 years and 7 months after law 1.77 (1.59–1.96) 44 566 1.37 (1.23–1.52) 27 244 1.02 (0.81–1.28) 2 24 0.92 (0.74–1.15) –9 –138

AF, attributable fraction; CI, confidence interval; EC, engine capacity; RR, relative risk.
a In time-series analysis with Poisson regression models.

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