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 3. Trend change in risk of injury from month to month before and after 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)
%a P-value %a P-value %a P-value %a P-value
Trend
Pre-law –0.30 0.253 –0.10 0.951 –0.40 < 0.05 –0.70 < 0.001
Post-law 1.30 < 0.001 0.40 < 0.05 –0.30 0.063 –0.90 < 0.001
Change from pre- to post-law period 1.60 < 0.001 0.50 0.177 0.10 0.595 –0.20 0.446

EC, engine capacity.
a In time-series analysis with Poisson regression models.

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