TABLE 3.
Incidence Rate of Concussions in Extreme Sports
| Sport | Incidence Rate per 1,000,000 Person-Years | Incidence Rate Ratio |
|---|---|---|
| Mountain biking | 50 | 1 |
| Snowmobiling | 60 | 1.2 |
| Surfing | 103 | 2.06 |
| Snow skiing | 152 | 3.04 |
| Skateboarding | 415 | 8.3 |
| Snowboarding | 534 | 10.68 |
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