Table 2.
Tabulation of different ROI CT attenuation values, expressed in Hounsfield unit (HU) for L1 to L4 and their mean values and 95% confidence interval (CI), for DXA-defined normal, osteopenia, and osteoporosis subgroup
| Vertebrae | Methods | Normal | Osteopenia | Osteoporosis | p |
|---|---|---|---|---|---|
| L1 | BMD (g/cm2) | 1.11 (1.02, 1.19)* | 0.89 (0.84, 0.96)▲ | 0.71 (0.62, 0.77)▲,* | < 0.001 |
| Round ROICT (HU) | 164.00 (131.00, 223.00)* | 131.00 (75.25, 165.75)▲ | 73.00 (33.00, 91.00)▲,* | < 0.001 | |
| Oval ROICT (HU) | 172.00 (128.50, 219.00)* | 128.00 (85.00, 165.00)▲ | 69.00 (36.00, 93.00)▲,* | < 0.001 | |
| Right ROICT (HU) | 163.00 (117.50, 196.00)* | 116.50 (89.75, 148.25)▲ | 74.00 (50.00, 96.00)▲,* | < 0.001 | |
| Front ROICT (HU) | 169.00 (134.00, 219.50)* | 135.00 (83.00, 168.25)▲ | 71.00 (38.00, 92.00)▲,* | < 0.001 | |
| Left ROICT (HU) | 189.00 (138.00, 203.00)* | 130.00 (101.00, 163.50)▲ | 73.00 (47.00, 98.00)▲,* | < 0.001 | |
| L2 | BMD (g/cm2) | 1.18 (1.07, 1.27)* | 0.94 (0.90, 0.98)▲ | 0.75 (0.63, 0.83)▲,* | < 0.001 |
| Round ROICT (HU) | 163.00 (141.00, 213.00)* | 106.00 (74.75, 139.25)▲ | 68.00 (38.00, 99.00)▲,* | < 0.001 | |
| Oval ROICT (HU) | 156.00 (127.00, 208.00)* | 110.00 (73.50, 141.25)▲ | 73.00 (36.00, 106.00)▲,* | < 0.001 | |
| Right ROICT (HU) | 140.00 (109.50, 200.00)* | 103.50 (91.25, 137.75)▲ | 71.00 (41.00, 102.00)▲,* | < 0.001 | |
| Front ROICT (HU) | 153.00 (127.50, 213.00)* | 110.50 (80.00, 146.75)▲ | 69.00 (40.00, 104.00)▲,* | < 0.001 | |
| Left ROICT (HU) | 162.00 (126.00, 200.50)* | 115.50 (84.25, 152.75)▲ | 71.00 (31.00, 105.00)▲,* | < 0.001 | |
| L3 | BMD (g/cm2) | 1.29 (1.15, 1.38)* | 1.03 (0.95, 1.07)▲ | 0.80 (0.65, 0.86)▲,* | < 0.001 |
| Round ROICT (HU) | 153.00 (111.50, 208.00)* | 95.50 (61.00, 132.00)▲ | 53.00 (27.00, 75.00)▲,* | < 0.001 | |
| Oval ROICT (HU) | 152.00 (116.00, 205.00)* | 94.00 (62.50, 138.50)▲ | 48.00 (28.00, 75.00)▲,* | < 0.001 | |
| Right ROICT (HU) | 154.00 (110.50, 199.00)* | 100.50 (75.87, 118.50)▲ | 68.00 (36.00, 92.00)▲,* | < 0.001 | |
| Front ROICT (HU) | 152.00 (119.00, 210.00)* | 95.00 (64.50, 135, 75)▲ | 54.00 (24.00, 79.00)▲,* | < 0.001 | |
| Left ROICT (HU) | 166.00 (134.00, 205.00)* | 100.50 (78.50, 127.50)▲ | 58.00 (37.00, 91.00)▲,* | < 0.001 | |
| L4 | BMD (g/cm2) | 1.29 (1.15, 1.38)* | 1.02 (0.95, 1.07)▲ | 0.82 (0.68, 0.88)▲,* | < 0.001 |
| Round ROICT (HU) | 166.00 (118.00, 218.50)* | 99.00 (60.50, 132.00)▲ | 58.00 (16.00, 81.00)▲,* | < 0.001 | |
| Oval ROICT (HU) | 164.00 (115.50, 206.50)* | 94.00 (61.25, 130.50)▲ | 55.00 (23.00, 85.00)▲,* | < 0.001 | |
| Right ROICT (HU) | 179.00 (134.00, 247.00)* | 134.00 (97.50, 173.25)▲ | 81.00 (46.00, 103.00)▲,* | < 0.001 | |
| Front ROICT (HU) | 171.00 (121.00, 222.00)* | 101.50 (69.00, 135.25)▲ | 65.00 (22.00, 88.00)▲,* | < 0.001 | |
| Left ROICT (HU) | 196.00 (128.00, 226.50)* | 119.00 (93.50, 152.50)▲ | 83.00 (53.00, 104.00)▲,* | < 0.001 | |
| L1–L4 | BMD (g/cm2) | 1.24 (1.10, 1.28)* | 0.99 (0.92, 1.03)▲ | 0.77 (0.64, 0.84)▲,* | < 0.001 |
| Round ROICT (HU) | 162.25 (123.25, 217.25)* | 107.00 (68.88, 142.00)▲ | 53.00 (35.00, 85.25)▲,* | < 0.001 | |
| Oval ROICT (HU) | 158.75 (123.38, 213.13)* | 102.63 (71.69, 140.81)▲ | 54.75 (32.25, 88.50)▲,* | < 0.001 | |
| Right ROICT (HU) | 156.75 (120.88, 206.88)* | 111.50 (93.94, 149.13)▲ | 74.00 (47.25, 98.00)▲,* | < 0.001 | |
| Front ROICT (HU) | 159.00 (125.13, 214.75)* | 107.25 (70.94, 144.75)▲ | 57.25 (53.50, 85.75)▲,* | < 0.001 | |
| Left ROICT (HU) | 171.25 (135.75, 214.50)* | 115.00 (96.63, 142.50)▲ | 68.00 (41.75, 103.75)▲,* | < 0.001 |
▲Indicates a statistically significant difference compared to the normal
*Indicates a statistically significant difference compared to osteopenia