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.