Table 1.

Cortical and medullary canal widths of femurs according to classification of Hartofilakidis et al.*

Level	Cortical width (mm)			Medullary width (mm)
	C1 Mean ± SD (mm)	C2 Mean ± SD (mm)	p Value	C1 Mean ± SD (mm)	C2 Mean ± SD (mm)	p Value
2	41.7 ± 8.5	33.4 ± 6.3	< 0.001	36.2 ± 8.7	25.2 ± 4.8	< 0.001
1	36.0 ± 6.2	29.2 ± 4.2	< 0.001	28.1 ± 6.6	21.2 ± 3.8	< 0.001
CLT	31.2 ± 4.6	26.6 ± 3.8	< 0.001	22.8 ± 4.8	17.4 ± 3.8	< 0.001
−1	28.4 ± 4.0	25.8 ± 3.6	0.017	19.4 ± 4.0	14.9 ± 3.6	< 0.001
−2	26.9 ± 3.2	24.3 ± 3.8	0.010	17.1 ± 3.3	13.2 ± 3.4	< 0.001
−3	25.1 ± 2.7	23.7 ± 3.1	0.085	14.3 ± 2.8	11.8 ± 3.4	0.005
−4	24.0 ± 2.7	23.1 ± 3.0	0.265	13.1 ± 2.5	11.3 ± 3.1	0.023
−5	23.6 ± 2.5	22.8 ± 2.8	0.259	12.3 ± 2.4	10.8 ± 2.8	0.051
-6	23.1 ± 2.5	22.3 ± 2.5	0.268	11.7 ± 2.1	10.5 ± 2.8	0.082
−7	22.9 ± 2.5	22.2 ± 2.5	0.346	11.3 ± 2.2	10.3 ± 2.6	0.176
−8	22.5 ± 2.6	22.3 ± 2.4	0.773	10.8 ± 2.2	10.0 ± 2.5	0.223
−9	22.4 ± 2.6	22.2 ± 2.2	0.714	10.5 ± 2.1	9.8 ± 2.4	0.281
−10	22.5 ± 2.5	22.3 ± 2.3	0.741	10.8 ± 2.1	9.7 ± 2.3	0.080
Isthmus	22.2 ± 2.8	22.0 ± 2.3	0.882	10.2 ± 1.9	9.1 ± 2.4	0.129

* Types C1 and C2 (AP view); values are expressed as mean ± SD; CLT = center of the lesser trochanter.