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Whether wearing a helmet

Codes and Frequencies

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For all injury episodes that occurred during the past 3 months that happened while the person was riding a bicycle or tricycle; a scooter, skateboard, skates, or other non-motorized vehicle; a motorcycle; or an all-terrain vehicle or ski/snow-mobile, IRHELMT reports whether or not the person was wearing a helmet at the time of the accident.

IRHELMT is an injury-level variable.

IRHELMT is part of a series of variables initiated in 1997 that systematically report persons' injuries and poisonings, the cause, what the person was doing while sustaining the injury or poisoning, and where she/he was at the time of the injury or poisoning. For related variables and additional information, please see the User note on Injuries and Poisonings or use the IPUMS NHIS search function and drop-down menus.


This variable is comparable across available years.


  • 1997-2013; 2014 2015 2016 2017: All injuries while riding a bicycle, motorcycle (including mopeds, minibikes), or an all terrain vehicle or ski/snow mobile.


  • 1997-2017