Table 1.

Comparison of original and revised ASBMR case definition

	Original	Revised (changes from 2010 are in italicized font)
		The fracture must be located along the femoral diaphysis from just distal to the lesser trochanter to just proximal to the supracondylar flare
Major features	The fracture located anywhere along the femur from just distal to the lesser trochanter to just proximal to the supracondylar flare
	Associated with no trauma or minimal trauma, as in a fall from a standing height or less	Associated with no trauma or minimal trauma, as in a fall from a standing height or less
	Transverse or short oblique configuration	Fracture line originates at the lateral cortex and is substantially transverse in orientation, although it may become oblique as it progresses medially across the femur
	Noncomminuted	Noncomminuted or minimally comminuted
	Complete fractures extend through both cortices and may be associated with a medial spike; incomplete fractures only involve lateral cortex	Complete fractures extend through both cortices and may be associated with a medial spike; incomplete fractures only involve lateral cortex
		Localized periosteal or endosteal thickening of lateral cortex at the fracture site (“beaking or flaring”)
Minor features	Localized periosteal reaction of lateral cortex (“beaking or flaring”)
	Generalized increase in cortical thickness of the diaphysis	Generalized increase in cortical thickness of the femoral diaphyses
	Prodromal symptoms, such as dull or aching pain in groin or thigh	Unilateral or bilateral prodromal symptoms such as pain. B
	Bilateral fractures and symptoms	Bilateral incomplete or complete femoral diaphysis fractures
	Delayed healing	Delayed fracture healing