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Potential confounding variables
| Variable | TCP used (union) | TCP used (nonunion) | P |
|---|---|---|---|
| Age | VB 30.6±13.7 | VB 37.67±8.08 | 0.293 |
| Tibia 29.5±12.3 | Tibia 40±9.18 | 0.071 | |
| NUS | 63.26±6.903 | 65.75±4.590 | 0.423 |
| Time to second surgery (days) | 53.84±13.409 | 50.13±11.128 | 0.498 |
NUS=Nonunion score, TCP=Tri-calcium phosphate, VB=Vascularized bone
