Average probability of always or almost always using a helmet, for riders under age 16; values are % (SE)
| Average probability of always or almost always using a helmet, by rider category | |||
|---|---|---|---|
| Condition for estimating average probability of helmet use | All riders | Riders from states with helmet laws | Riders from states without laws |
| Helmet laws as they existed at time of 1998 survey | 58.6 (1.5) | 72.3 (1.9) | 49.6 (1.8) |
| Assuming all states had helmet laws | 69.9 (1.2) | 72.3 (1.9) | 68.3 (1.6) |
| Assuming no states had helmet laws | 51.5 (1.4) | 54.2 (2.2) | 49.6 (1.8) |