Odds ratios and relative risk
One of the most difficult statistical concepts to grasp, and one which many helmet researchers have not properly understood.
Statistical research: some concepts and definitions
Child deaths due to cycle helmets
Children at play strangled by bicycle helmets
Cycling deaths in selected countries
IRTAD statistics for AUS, CDN, DK, F, D, I, J, NL, UK, USA
Fatalities in cycle sport
Since helmets were made mandatory in cycle sport, the number of deaths has increased.
Child cyclists requiring treatment in Dutch hospitals 1998 to 2000
Child cyclist head injuries in England
Child cyclist injuries involving head injury, Great Britain
Cycling fatalities, Great Britain
Cyclists requiring treatment in US hospitals 1991 to 2000
FARS bicycle helmet use data
NEISS data on bicyclist injuries