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. 2016 Sep 26;11:106. doi: 10.1186/s13018-016-0441-7

Table 2.

AO/OTA classification for femur fractures

Classification ≤30 y/o (N a) ≥60 y/o (N)
31A 5 8
31B 5 2
31C 0 0
32A 22 3
32B 26 3
32C 12 3

a4 patients ≤30 y/o had ipsilateral femur fractures