Table 4. Overview of inflammatory response and fracture repair in 38 birds with fracture lines in the caudal part of the keel bone observed by histological evaluation.
| Age 1 | Total | P-value (Chi square) | |||
|---|---|---|---|---|---|
| >75 weeks | 32 weeks | ||||
| Fracture line—hemorrhage | Absent | 29a | 3b | 32 | 0.001 |
| Minimal | 2a | 4b | 6 | ||
| Fracture line—inflammation | Absent | 31 | 7 | 38 | N/A |
| Collagen in fracture line | Absent | 12a | 6b | 18 | 0.058 |
| Minimal | 13a | 0b | 13 | ||
| Moderate | 6 | 1 | 7 | ||
| Callus formation | Absent | 8a | 5b | 13 | 0.063 |
| Minimal | 17 | 1 | 18 | ||
| Moderate | 6 | 1 | 7 | ||
| Callus—immature | Absent | 21 | 7 | 28 | 0.080 |
| Minimal | 10 | 0 | 10 | ||
| Callus—mature (ossified) | Absent | 17 | 5 | 22 | 0.715 |
| Minimal | 8 | 1 | 9 | ||
| Moderate | 6 | 1 | 7 | ||
1Different superscript letter denotes a subset of Age categories whose column proportions differ significantly from each other (z-test, P<0.05).