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Table 1 Study population according to the two groups of patients (fractured versus non-fractured). p-values (last column) refers to the comparison between the group of patients in which a vertebral fracture occurred at follow-up (fracture = yes) and those who did not develop a vertebral fracture (fracture = no)

From: Bone Strain Index predicts fragility fracture in osteoporotic women: an artificial intelligence-based study

Characteristic Whole population (n = 174) Fracture = yes (n = 69) Fracture = no (n = 105) p-value
Mean SD Range Mean SD Mean SD
Menopause age 48.4 5.1 38–60 48.1 5.4 48.6 4.8 0.5
Weight 60.0 9.6 37–98 58.5 7.9 60.9 10.5 0.4
Age 66.3 9.8 41–88 66.6 10.6 66.1 9.3 0.35
BMI 24.2 3.7 14.82–34.89 24.4 3.7 24.1 3.7 0.8
Lumbar BMC 41.32 9.92 14.96–81.01 37.25 8.10 44.03 10.11 0.021
Lumbar BMD 0.813 0.131 0.525–1.281 0.774 0.090 0.867 0.142 < 0.005
Lumbar BSI 2.298 0.586 1.076–4.299 2.467 0.54 2.031 0.581 0.28
Neck BMC 3.12 0.50 2.11–4.74 2.96 0.37 3.29 0.53 0.001
Neck BMD 0.667 0.091 0.365–0.879 0.603 0.073 0.698 0.102 0.006
Neck BSI 1.929 0.521 0.772–3.991 2.085 0.614 1.821 0.450 < 0.005
TF BMC 24.81 4.46 14.84–38.58 23.71 3.75 25.66 4.73 0.023
TF BMD 0.773 0.11 0.427–1.111 0.752 0.101 0.801 0.115 0.20
TF BSI 1.638 0.402 0.992–3.332 1.751 0.482 1.606 0.325 < 0.005
  1. SD Standard deviation, BMI Body mass index, BMC Bone mineral content, BMD Bone mineral density, BSI Bone Strain Index, TF Total femur