Table 3.

Volume ratios and their ability to distinguish varying severity of the Erlenmeyer flask deformity across femurs within the same patient

	Number of patients	Average difference in (volume 4–6 cm/volume 0–2 cm) ± SD	Average difference in (volume 4–6 cm/volume 2–4 cm) ± SD	Average difference in (volume 2–4 cm/volume 0–2 cm) ± SD
No EFD + mild EFD	3	0.12 ± 0.05	0.07 ± 0.05	0.08 ± 0.07
Mild EFD + severe EFD	6	0.08 ± 0.04	0.03 ± 0.05	0.07 ± 0.03
Total	9	0.09 ± 0.04	0.05 ± 0.05	0.07 ± 0.04

SD standard deviation