Table 3. Incidence rate (/100,000 person-years) of AFF identified radiologically after bisphosphonate use.

Authors	Country	Study period	Age, yr	No. of subjects	AFF	Incidence rate, %
Schilcher and Aspenberg21	Sweden	2005–2008	≥ 55	3,087	5	100.0a
Tamminen et al.20	Finland	2007–2009	≥ 50	4,379	8	61.0
Meling et al.31	Norway	2004–2011	≥ 65	2,214	16	79.0
Current study	Korea	2003–2012	≥ 45	10,338	13	85.9 (103.8a)

AFF = atypical femoral fracture.

^aIn patients with bisphosphonate for at least 3 years.