From: Cortical bone loss is an early feature of nonradiographic axial spondyloarthritis
axSpA < 2 yr (n = 46) | axSpA > 2 yr (n = 55) | Control subjects (n = 50) | axSpA < 2 yr vs. axSpA > 2 years vs. control subjects | axSpA < 2 yr vs. control subjects | axSpA < 2 yr vs. axSpA > 2 yr | axSpA > 2 yr vs. control subjects | |
---|---|---|---|---|---|---|---|
Bone geometry | |||||||
Total bone area, mm2 | 317 (114) | 349 (94) | 326 (116) | 0.060 | 0.322 | 0.023 | 0.136 |
Ct. area, mm2 | 59 (18) | 61 (22) | 65 (23) | 0.068 | 0.032 | 0.703 | 0.066 |
Tb. area, mm2 | 250 (95) | 277 (88) | 254 (83) | 0.068 | 0.628 | 0.041 | 0.062 |
Volumetric bone mineral density | |||||||
Total BMD, HA/cm3 | 317 (49) | 309 (75) | 334 (61) | 0.096 | 0.170 | 0.423 | 0.036 |
Ct. BMD, HA/cm3 | 833 (62) | 814 (65) | 846 (78) | 0.012 | 0.096 | 0.167 | 0.004 |
Tb. BMD, HA/cm3 | 173 (44) | 175 (47) | 183 (68) | 0.571 | 0.289 | 0.564 | 0.610 |
Tb. meta BMD, HA/cm3 | 233 (38) | 234 (51) | 243 (61) | 0.561 | 0.294 | 0.728 | 0.465 |
Tb. inn BMD, HA/cm3 | 132 (47) | 135 (52) | 141 (72) | 0.618 | 0.359 | 0.464 | 0.753 |
Bone microstructure | |||||||
BV/TV, % | 14.4 (3.7) | 14.6 (3.9) | 15.2 (5.7) | 0.575 | 0.288 | 0.564 | 0.628 |
Tb. N, mm− 1 | 2.12 (0.30) | 2.05 (0.41) | 2.11(0.42) | 0.534 | 0.739 | 0.263 | 0.480 |
Tb. Th, μm | 68 (15) | 71 (15) | 72 (17) | 0.244 | 0.171 | 0.120 | 0.946 |
Tb. Sp, μm | 410 (66) | 423 (107) | 410 (104) | 0.677 | 0.956 | 0.480 | 0.424 |
Inhomogeneity, μm | 165 (41) | 178 (48) | 169 (47) | 0.351 | 0.575 | 0.149 | 0.399 |
Ct. Th, μm | 775 (160) | 759 (235) | 840 (160) | 0.015 | 0.050 | 0.245 | 0.007 |
Ct. Po, % | 2.0 (1.46) | 2.8 (1.72) | 2.2 (1.57) | 0.064 | 0.373 | 0.020 | 0.157 |