Table 1: Epidemiological Data for Patients Presenting with a Fractured Distal Femur.

Whole
Series		 Male Female AO 33-A
Overall		 AO 33-A
Male		 AO 33-A
Female		 AO 33- B
Overall		 AO 33-B
Male		 AO 33-B
Female		 AO 33-C
Overall		 AO 33-C
Male		 AO 33-C
Female
Mean Age (Yr)   63 61.6 64.0 64.6 62.4 66.5 60.2 57.9   63.2 63.1   71.3   56.3
Median Age (Yr)  67.5 65.6 71.0 71.2 66.2 72.6 65.2 65.1   65.1 63.3   85.7 55
Min Age (Yr)   15  15  17  17  17  17  15  25  15  21 21 27
Max Age (Yr)   101  92  101  101  91  101  95  92  95  91 91 86
Right Sided (%) 45.6, n=57 21.0, n=26 25.0, n=31 29.0, n=36 12.1, n=15 16.9, n=21 9.7, n=12 5.6, n=7 4.0, n=5 7.3, n=9 3.2, n=4 4.0, n=5
Left Sided (%) 52.8, n=66 21.0, n=26 32.3, n=40 21.8, n=27 4.8, n=6 16.9,n=21 21.0, n=26 11.3, n=14 9.7, n=12 10.5, n=13 4.8, n=6 5.6, n=7
Bilateral
(%)		   0.8, n=1   0 0.8, n=1 0.8, n=1   0 0.8, n=1   0   0  0   0  0  0
Associated
Injury (%)		 25.8, n=32 16.7, n=21 8.9, n=11 11.3, n=14 6.5, n=8 4.8, n=6 9.7, n=12 3.2, n=4 6.5, n=8 4.8, n=6 4.0, n=5 0.8, n=1
High-
Energy
Mechanism
* (%)		 45.8, n=44 32.3, n=31 13.5, n=13 17.7, n=17 11.5, n=11 2.3, n=6 16.7, n=16 12.5, n=12 4.2, n=4 11.5, n=11 7.3, n=7 4.2, n=4
Low-
Energy
Mechanism
* (%)		 54.2, n=52 9.4, n=9 44.8, n=43 33.3, n=32 31.3, n=30 2.1, n=2 13.5, n=13 5.2, n=5 8.3, n=8 7.3, n=7 2.1, n=2 5.2, n=5
Total
Number of Patients		   124  52  72  64  21  43  38  21  17  22 10 12

* High-Energy Mechanism comprises fall from height >2m, Road Traffic Collisions, Assault and Penetrating Injuries. Low-Energy Mechanism comprises of fall from<2m. Unspecified injuries (n=28) are excluded from this analysis.