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Table 3 The correlation (Spearman rho) between the HRpQCT parameters, age, lumbar QCT, and mSASSS in the AS patients

From: Bone microarchitecture in ankylosing spondylitis and the association with bone mineral density, fractures, and syndesmophytes

HRpQCT radius DTrab (mg/cm3) BV/TV (%) Tbth (μm) TbN (per mm) TbSp (μm) DCort (mg/cm3) CortTh (μm) CtPo (%) CtPoDiam (μm)
Age -0.471 -0.473 -0.507 -0.040 0.166 -0.337 -0.228 0.540 0.055
P< 0.001 P< 0.001 P< 0.001 P = 0.755 P = 0.198 P= 0.007 P = 0.075 P< 0.001 P = 0.663
Lumb QCT 0.762 0.763 0.737 0.106 -0.304 0.425 0.420 -0.480 - 0.136
Trab vBMD P< 0.001 P< 0.001 P< 0.001 P = 421 P= 0.018 P= 0.001 P= 0.001 P< 0.001 P = 0.290
Lumb QCT 0.296 0.298 0.152 0.296 - 0.341 0.123 0.152 0.032 0.006
Cort vBMD P= 0.021 P= 0.021 P = 0.246 P= 0.022 P= 0.008 P = 0.348 P = 247 P = 0.805 P = 0.961
Msasss - 0.400 - 0.400 - 0.528 0.077 0.039 - 0.192 - 0.196 0.352 0.022
P= 0.001 P= 0.001 P< 0.001 P = 0.552 P = 0.761 P = 0.135 P = 0.128 P= 0.004 P = 0.861
HRpQCT tibia DTrab BV/TV Tbth TbN TbSp DCort CortTh CtPo CtPoDiam
(mg/cm3) (%) (μm) (mm-1) (μm) (mg/cm3) (μm) (%) (μm)
Age - 0.470 - 0.471 - 0.479 - 0.185 0.246 - 0.436 - 0.202 0.521 0.210
P< 0.001 P< 0.001 P< 0.001 P = 0.127 P= 0.042 P< 0.001 P = 0.096 P< 0.001 0.084
Lumb QCT 0.712 0.714 0.523 0.363 - 0.443 0.454 0.403 - 0.496 - 0.437
Trab vBMD P< 0.001 P< 0.001 P< 0.001 P= 0.003 P< 0.001 P< 0.001 P= 0.001 P< 0.001 P< 0.001
Lumb QCT 0.336 0.336 0.027 0.356 - 0.367 0.135 0.151 - 0.102 - 0.162
Cort vBMD P= 0.005 P= 0.005 P = 0.827 P= 0.003 P= 0.002 P = 0.276 P = 0.223 P = 0.410 P = 0.191
mSASSS - 0.475 - 0.475 - 0.488 - 0.105 0.176 - 0.315 -0.161 0.363 0.169
  P< 0.001 P< 0.001 P< 0.001 P = 0.392 P = 0.148 P= 0.008 P = 0.186 P= 0.002 P = 0.169
  1. BV/TV, trabecular bone volume fraction; Cort, cortical; DCort, vBMD of cortical peripheral bone; DTrab, vBMD of trabecular peripheral bone; CortTh, cortical thickness peripheral bone; CtPo, cortical porosity; CtPoDiam, mean cortical pore diameter; HRpQCT, high-resolution peripheral quantitative computed tomography; Lumb, lumbar; TbN, trabecular number peripheral bone; TbSp, trabecular separation peripheral bone; Tbth,trabecular thickness peripheral bone; Trab, trabecular; vBMD, volumetric bone mineral density; QCT, quantitative computed tomography.