In terms of injuries per 1,000 skier or snowboarder days, Switzerland reports around 3.5, Norway 1.5, Vermont, US, 1.9, and Canada 2.5.
[7][8] Product certification norms include the European CE standard CEN 1077, issued in 1996, The American Society of Testing and Materials F2040, and the Snell RS-98.
[9] However, Swiss statistics on rescue services provided to people injured in snow sports show a fairly constant proportion of head injuries, while the observed rate of helmet wearing increased from 16% in 2002-3 to 76% in 2009-10.
One study found that helmeted skiers tend to go faster[13] and helmet-wearing has been associated with self-reports of more risky behavior.
[14] Other studies find that helmet use is not associated with self-reports of riskier behavior[15][16] and does not increase the risk of other injuries.