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Table 4 Failure load and failure strength in relation to gender and fracture numbers

From: Breaking strength and bone microarchitecture in osteoporosis: a biomechanical approximation based on load tests in 104 human vertebrae from the cervical, thoracic, and lumbar spines of 13 body donors

Parameters Total (n = 13)
M ± SD
Female (n = 9)
M ± SD
Male (n = 4)
M ± SD
 ≤ 1 Fx
M ± SD
 ≥ 2 Fx
M ± SD
Group comparison p value*p value**  
Failure load (N) Total 2001 ± 650 1728 ± 543 2616 ± 421 2301 ± 385 1744 ± 744 0.015 0.127
C5 1642 ± 661 1457 ± 517 2059 ± 836 2049 ± 742 1293 ± 328 0.135 0.033
C6 1422 ± 635 1198 ± 458 1928 ± 751 1713 ± 725 1173 ± 461 0.051 0.131
T7 1789 ± 788 1469 ± 477 2507 ± 937 2094 ± 453 1527 ± 946 0.020 0.208
T8 1951 ± 899 1580 ± 695 2785 ± 779 2466 ± 568 1509 ± 925 0.018 0.05
T9 2044 ± 826 1714 ± 736 2784 ± 478 2407 ± 451 1732 ± 975 0.023 0.149
T12 2308 ± 737 2080 ± 746 2823 ± 422 2662 ± 485 2005 ± 810 0.093 0.111
L1 2572 ± 1176 2358 ± 1150 3051 ± 1250 2698 ± 940 2463 ± 1414 0.349 0.736
L3 2282 ± 1087 1967 ± 1137 2990 ± 563 2321 ± 1049 2249 ± 1202 0.121 0.910
Failure strength (N/mm2)Total 2.4 ± 0.8 2.3 ± 0.8 2.8 ± 0.7 2.7 ± 0.5 2.2 ± 0.9 0.267 0.189
C5 4.4 ± 1.7 4.1 ± 1.5 5.3 ± 2.0 5.4 ± 1.9 3.6 ± 0.9 0.265 0.068
C6 3.4 ± 1.5 3.0 ± 1.3 4.2 ± 1.6 3.8 ± 1.5 3.0 ± 1.5 0.198 0.313
T7 2.1 ± 0.8 1.9 ± 0.8 2.5 ± 1.0 2.3 ± 0.6 1.9 ± 1.0 0.240 0.386
T8 2.1 ± 0.8 1.8 ± 0.8 2.5 ± 0.8 2.5 ± 0.6 1.7 ± 0.8 0.151 0.047
T9 2.0 ± 0.6 1.8 ± 0.7 2.3 ± 0.3 2.3 ± 0.2 1.7 ± 0.8 0.224 0.161
T12 1.8 ± 0.7 1.8 ± 0.8 1.9 ± 0.3 2.0 ± 0.4 1.7 ± 0.9 0.964 0.554
L1 2.0 ± 1.1 2.1 ± 1.2 2.0 ± 0.9 2.0 ± 0.9 2.1 ± 1.3 0.878 0.932
L3 1.6 ± 0.8 1.5 ± 0.9 1.8 ± 0.3 1.5 ± 0.6 1.7 ± 1.0 0.652 0.710
  1. Values are presented as means ± SD; *group comparison male vs. female, ** group comparison ≤ 1 fracture (Fx) vs. ≥ 2 fractures, independent t test