Table 3.
Pelvic radiodensity trends across age groups: a Hounsfield Unit analysis.
| 20–30 (N = 10) | 30–40 (N = 10) | 40–50 (N = 11) | 50–60 (N = 9) | 60–70 (N = 10) | 70–80 (N = 10) | 80–90 (N = 10) | 90–100 (N = 10) | Total (N = 80) | p Value | |
|---|---|---|---|---|---|---|---|---|---|---|
| HU Itl | 0.442 1 | |||||||||
| Mean (SD) | 128.0 (20.2) | 122.6 (17.2) | 95.3 (12.5) | 95.2 (14.0) | 83.6 (12.1) | 70.1 (23.9) | 57.3 (31.4) | 47.4 (23.9) | 87.4 (33.4) | |
| Range | 102.0–166.0 | 99.0–149.0 | 83.0–125.0 | 73.0–117.0 | 61.0–97.0 | 29.0–99.0 | 1.0–89.0 | 12.0–88.0 | 1.0–166.0 | |
| HU Itr | <0.001 1 | |||||||||
| Mean (SD) | 130.5 (18.3) | 129.5 (18.2) | 102.2 (13.0) | 93.1 (11.3) | 80.6 (19.3) | 75.9 (21.6) | 55.0 (30.0) | 69.0 (25.6) | 92.1 (32.4) | |
| Range | 107.0–156.0 | 106.0–157.0 | 86.0–134.0 | 79.0–116.0 | 54.0–117.0 | 23.0–96.0 | 15.0–89.0 | 26.0–106.0 | 15.0–157.0 | |
| HU Pr | <0.001 1 | |||||||||
| Mean (SD) | 117.4 (6.8) | 118.4 (12.9) | 105.2 (15.2) | 97.7 (16.6) | 84.3 (30.4) | 76.2 (38.9) | 60.7 (36.2) | 53.7 (34.5) | 89.3 (34.4) | |
| Range | 105.0–127.0 | 102.0–138.0 | 79.0–126.0 | 77.0–121.0 | 45.0–121.0 | 19.0–117.0 | 11.0–102.0 | 10.0–99.0 | 10.0–138.0 | |
| HU Pl | <0.001 1 | |||||||||
| Mean (SD) | 112.5 (11.6) | 114.6 (13.8) | 96.9 (10.1) | 94.7 (13.9) | 80.0 (32.6) | 68.9 (33.0) | 59.4 (47.7) | 47.0 (41.7) | 84.3 (36.2) | |
| Range | 97.0–132.0 | 99.0–139.0 | 81.0–114.0 | 71.0–117.0 | 34.0–124.0 | 24.0–101.0 | −10.0–107.0 | −14.0–103.0 | −14.0–139.0 | |
| HU Aal | <0.001 1 | |||||||||
| Mean (SD) | 101.7 (13.9) | 104.3 (19.0) | 102.8 (14.2) | 100.4 (15.0) | 79.6 (31.0) | 64.4 (31.3) | 52.6 (42.3) | 56.6 (65.3) | 82.8 (38.2) | |
| Range | 82.0–123.0 | 81.0–132.0 | 78.0–120.0 | 72.0–118.0 | 23.0–118.0 | 8.0–96.0 | −15.0–97.0 | −34.0–176.0 | −34.0–176.0 | |
| HU Apl | <0.001 1 | |||||||||
| Mean (SD) | 300.7 (32.5) | 263.8 (42.8) | 254.4 (52.9) | 250.0 (55.3) | 204.8 (68.2) | 191.8 (56.2) | 164.9 (61.0) | 113.3 (46.9) | 218.0 (76.4) | |
| Range | 245.0–341.0 | 214.0–311.0 | 183.0–316.0 | 184.0–318.0 | 98.0–279.0 | 78.0–244.0 | 78.0–223.0 | 23.0–175.0 | 23.0–341.0 | |
| HU Par | <0.001 1 | |||||||||
| Mean (SD) | 107.1 (14.2) | 107.2 (10.8) | 104.0 (9.9) | 106.4 (19.4) | 82.6 (31.4) | 77.6 (26.5) | 62.6 (28.3) | 58.0 (55.7) | 88.2 (33.2) | |
| Range | 89.0–134.0 | 95.0–124.0 | 84.0–121.0 | 75.0–128.0 | 43.0–128.0 | 17.0–99.0 | 15.0–89.0 | −23.0–120.0 | −23.0–134.0 | |
| HU Aar | <0.001 1 | |||||||||
| Mean (SD) | 107.6 (16.2) | 100.5 (14.0) | 102.1 (16.9) | 109.7 (24.0) | 82.5 (32.1) | 77.5 (20.8) | 57.6 (32.3) | 51.7 (53.7) | 86.0 (34.8) | |
| Range | 84.0–132.0 | 81.0–120.0 | 66.0–123.0 | 76.0–138.0 | 34.0–123.0 | 34.0–99.0 | 13.0–89.0 | −20.0–106.0 | −20.0–138.0 | |
| HU Apr | <0.001 1 | |||||||||
| Mean (SD) | 300.7 (26.8) | 285.4 (42.2) | 257.6 (58.4) | 250.0 (58.0) | 201.3 (71.8) | 203.7 (53.5) | 177.6 (55.9) | 123.4 (47.0) | 225.1 (75.5) | |
| Range | 267.0–342.0 | 234.0–339.0 | 187.0–326.0 | 185.0–308.0 | 109.0–278.0 | 89.0–253.0 | 101.0–235.0 | 37.0–189.0 | 37.0–342.0 | |
| HU Pal | <0.001 1 | |||||||||
| Mean (SD) | 105.8 (12.0) | 107.2 (15.6) | 102.5 (13.7) | 102.7 (16.5) | 83.0 (25.4) | 62.5 (34.9) | 50.6 (43.7) | 38.6 (53.5) | 81.6 (39.0) | |
| Range | 90.0–124.0 | 87.0–127.0 | 78.0–129.0 | 73.0–119.0 | 47.0–115.0 | −11.0–93.0 | −29.0–94.0 | −45.0–106.0 | −45.0–129.0 |
1.Linear model Anova; summary of Hounsfield Unit (HU) measurements across various age groups and anatomical regions of interest in the os coxae. Mean values are presented with standard deviations (SD) and ranges; regions include the right pubic symphysis (HU Itl), supracetabular (HU Itr), ischial tuberosity (HU Pr), anterior acetabulum (HU Pl), posterior acetabulum (HU Aal), and others as labeled.