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Table 3 Statistical analysis results of lumbar spine indexes

From: Spine system changes in soldiers after load carriage training in a plateau environment: a prediction model research

Item Pre LCT Post LCT Average rate of change (%) t P
CSA (mm2) 9126.371 ± 691.614 9862.655 ± 456.416 8.07 −6.368 0.0002
FCSA (mm2) 8089.556 ± 707.739 8747.917 ± 426.245 8.14 −5.348 0.0007
Gray value 80.396 ± 17.522 55.009 ± 10.641 −31.58 5.968 0.0003
FCSA/CSA 0.886 ± 0.032 0.887 ± 0.024 0.12 − 0.169 0.8703
L1/2 IVD (pixel) 14.486 ± 1.854 13.790 ± 1.933 − 4.80 3.308 0.0107
L2/3 IVD (pixel) 16.781 ± 2.559 16.671 ± 1.918 −0.66 0.455 0.6610
L3/4 IVD (pixel) 18.693 ± 2.105 18.120 ± 2.047 −3.07 2.278 0.0522
L4/5 IVD (pixel) 20.018 ± 2.169 19.290 ± 1.751 −3.64 3.509 0.0080
L5/S1 IVD (pixel) 17.266 ± 2.359 16.888 ± 2.815 −2.19 0.889 0.3999
L1-S1 IVD (pixel) 87.243 ± 8.943 84.759 ± 7.620 − 2.85 2.971 0.0180
L3/4 E-IF% 91.6 ± 2.0 88.1 ± 2.9 −3.80 8.214 0.0004
L4/5 E-IF% 89.6 ± 1.9 88.2 ± 1.7 −1.66 2.553 0.0511
LSA(°) 26.622 ± 5.303 32.422 ± 6.816 21.79 −4.911 0.0012
LLA(°) 24.011 ± 7.117 30.644 ± 7.415 27.63 − 4.851 0.0013
  1. LCT Load carriage training, CSA Cross-sectional area, FCSA Functional cross-sectional area, IVD Intervertebral discs, E-IF% Percentage of effective intervertebral foramen area, LSA Lumbosacral angle, LLA Lumbar lordosis angle