| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| Gradual onset/overuse | Gradual onset/overuse | Gradual onset/overuse | ||
| Sudden onset and contact with another participant | Sudden onset and contact with another participant | Sudden onset and contact with another participant | ||
| Sudden onset and no contact with another participant | Sudden onset and no contact with another participant | Sudden onset and no contact with another participant | ||
| Unknown | Unknown | Unknown |