Table 1.

Comparing age, density, geometry, and strength data of vertebrae L1–L2

Age, density, geometry		L1		L2
		Mean, SD	rage	Mean, SD	rage
Mean age	years	71.5 ± 13.7	−	71.7 ± 13.0	−
Bone mineral density, BMD	g/cm2	0.374 ± 0.085	−0.59	0.380 ± 0.095	−0.69
T-score	−	−5.27 ± 0.66	−0.52	−5.97 ± 0.79	−0.47
Superior cross–sectional area, Asup	mm2	1361 ± 259	+0.20	1389 ± 262	−0.20
Central cross–sectional area, Acentr	mm2	1061 ± 205	−0.03	1086 ± 244	+0.09
Inferior cross–sectional area, Ainf	mm2	1398 ± 187	+0.08	1425 ± 261	+0.22
Height without end–plates, h	mm	19.1 ± 2.8	−0.13	21.0 ± 3.3	−0.14
Volume of specimen, V	mm3	23421 ± 6226	−0.05	26548 ± 8381	+0.05
Ultimate load, Fu	N	3161 ± 1937	−0.63	3109 ± 1898	−0.58
Central ultimate stress, σu, centr	MPa	3.01 ± 1.73	−0.61	2.93 ± 1.74	−0.57
Ultimate strain, ɛu	%	5.11 ± 1.16	−0.06	4.99 ± 1.43	−0.11