Atypical Femoral Shaft Fractures in Female Bisphosphonate Users Were Associated with an Increased Anterolateral Femoral Bow and a Thicker Lateral Cortex: A Case-Control Study

Table 1

Comparison of radiographic measurement data between AFSF group and control group.

	AFSF	Control
Femoral bow
AP radiograph (degrees)	12.39 ± 5.387	3.97 ± 3.62	<0.0001
Lateral radiograph (degrees)	15.71 ± 5.62	10.72 ± 4.61	0.002
Medial CTI	0.236 ± 0.06	0.240 ± 0.05	0.773
Lateral CTI	0.323 ± 0.04	0.267 ± 0.04	<0.0001
CTI	0.558 ± 0.07	0.507 ± 0.08	0.009
Adjusted lateral cortical thickness (mm)	10.5 ± 1.4	8.1 ± 1.3	<0.0001

corrected value.
All data were presented as mean ± standard deviation.
AFSF: atypical femoral shaft fracture, AP: anteroposterior, and CTI: cortical thickness index.