Table 4.

Mechanical properties of left (contralateral) and right (“loaded”) tibia from C57BL/6 and BALB/c mice at 6 weeks

Parameter	Strain	AC		WashU		Cornell/HSS
		Left	Right	Left	Right	Left	Right
Ultimate Force [N]G	C57BL/6	24.5±2.8	26.6±3.2	26.5±3.6	28.3±2.4	25.4±1.7	29.1±2.8*
	BALB/c	21.1±2.7	22.1±2.7	23.6±3.4	25.9±2.7	23.8±1.8	28.4±2.5*,a
Ultimate Displacement [mm]G	C57BL/6	0.7±0.3	0.7±0.1	0.7±0.2	1.0±0.3*,a	0.6±0.1	0.9±0.1*,a
	BALB/c	0.6±0.1	0.6±0.1	0.7±0.1	1.0±0.2*,a	0.7±0.1	1.1±0.2*,a
Stiffness [N·mm−1]G	C57BL/6	62±18	68±7	69±20	53±10	67±7	55±8*
	BALB/c	49±8	56±13	54±9	49±10	52±6	53±8
Energy-to-Fracture [N·mm]G	C57BL/6	7.5±0.6	8.2±2.3	8.8±1.7	10.7±2.2	7.3±1.2	12.1±2.7*,a
	BALB/c	6.3±0.8	6.8±1.4	7.4±1.0	10.0±1.3*,a	7.9±1.2c	10.9±1.7*,a

Data are presented as mean±SD.

^*: Difference between left (contralateral) and right (“loaded”) tibia;

^G: main effect of group,

^a: relative change (Loaded vs Contralateral, %) different from AC of same mouse strain and time,

^c: absolute value of contralateral outcome different from contralateral of AC from same mouse; p<0.05.