Tibial shaft fractures is common long tubular fracture that account for about 13.7% of all fractures. And the incidence of nonunion of tibial shaft fracture varied from 1% to 80%. This study aimed to confirm the risk factors of nonunion of tibial shaft fracture. Moreover, the investigators hope to establish the clinical pathway of various risk factors for fracture nonunion and affirm the importance of different risk factors.

Tibial shaft fractures is common long tubular fracture that account for about 13.7% of all fractures. And the incidence of nonunion of tibial shaft fracture varied from 1% to 80%. The investigators retrospectively analyzed the demographics of these participants in our hospital that occur long tubular fracture. One group is participants that existed fracture nonunion. And the other group is the participants that did not exist fracture nonunion. The investigators recorded twelve variables and confirm the risk factors by uni-variate Logistic regression analysis. Moreover, the investigators hope to establish the clinical pathway of various risk factors for fracture nonunion and affirm the importance of different risk factors.

Inclusion Criteria:

• The tibial shaft fracture was caused by trauma.

Exclusion Criteria:

• The tibial shaft fracture was caused by tumor, infection and other reasons.

The population came from The Second Affiliated Hospital of Zhejiang University.