Subsequent injury categorisation (SIC) codes and definitions based on Finch and Cook24
| Subsequent injury type by body area and nature (overarching category) | Code | Definition |
| No injury | 1 | No injury, for statistical purposes only |
| Exact same injury in terms of body site and nature | 2 | Same type, same side, same body area as a fully recovered index injury, and related to an index injury |
| 3 | Acute onset exacerbation or reinjury before full recovery, related to an index injury | |
| 4 | Continual or sporadic experiences of pain or other physical discomfort—related to an index injury | |
| 5 | Continual or sporadic experiences of pain or other physical discomfort—not related to an index injury | |
| 6 | Same type and same body area but not related to an index injury | |
| Injury to same body site but different nature | 7 | Occurrence related to an index injury |
| 8 | Occurrence not related to an index injury | |
| Injury to different body part (irrespective of nature) | 9 | Occurrence related to an index injury |
| 10 | Occurrence not related to an index injury |