Table 4.
Mean measurements of cancellous bone area proximally (position 100 mm to 70 mm) and distally (position –10 mm to –20 mm), postoperatively and and at follow-up. The coefficient of variation (precision of measurements) is given for each scan position deriving from five repeated CT-scans of 5 cadavers
| A | B | C | D | E | F | G | H | I |
|---|---|---|---|---|---|---|---|---|
| A–I: See Table 1. | ||||||||
| 100 mm | 1.4% | 910 (194) | 967 (168) | 56 (6%) | 0.2 | 1,055 (174) | 144 (16%) | < 0.01 |
| 90 mm | 1.1% | 674 (162) | 739 (160) | 66 (10%) | 0.8 | 840 (153) | 166 (25%) | < 0.001 |
| 80 mm | 0.5% | 480 (112) | 567 (135) | 87 (18%) | 0.07 | 599 (119) | 118 (25%) | < 0.001 |
| 70 mm | 0.4% | 354 (74) | 421 (78) | 67 (19%) | 0.05 | 440 (100) | 87 (25%) | < 0.001 |
| –10 mm | 0.3% | 191 (105) | 197 (106) | 7 (4%) | 0.7 | 207 (157) | 17 (9%) | 1.0 |
| –20 mm | 0.4% | 201 (137) | 219 (160) | 18 (9%) | 0.9 | 207 (132) | 7 (3%) | 1.0 |