Table 1.

Patient characteristics for bisphosphonate-treated atypical fracture, bisphosphonate-treated typical fracture, bisphosphonate-treated nonfracture, bisphosphonate-naïve typical fracture, and bisphosphonate-naïve nonfracture groups

Characteristic	+BIS Atypical	+BIS Typical	+BIS Nonfx	−BIS Typical	−BIS Nonfx
No.	12	10	5	11	12
% female	100	100	100	100	100
Age, y, mean (SD)	72 (9.1)	81 (12)	75 (11)	83 (4.9)	71 (5.8)
Fracture morphology	12 atypical subtrochanteric	9 intertrochanteric	N/A	10 intertrochanteric	N/A
		1 spiral subtrochanteric		1 spiral subtrochanteric
Bisphosphonate treatment duration, y, mean (SD)	8.2 (3.0)	7.7 (5.0)	6.4 (3.5)	N/A	N/A
Bisphosphonate treatment type	10 alendronate	5 alendronate	2 alendronate	N/A	N/A
	2 ibandronate	5 risedronate	3 risedronate

N/A, not applicable.