Background
Methods
Study population
Radiograph review
Analysis
Results and discussion
Subject characteristics
Condition
|
Number cases
|
Number controls
| |
---|---|---|---|
N = 12
|
N = 29
| ||
‘Age | mean years | 66.9 | 70.4 |
(range) | (46–78) | (56–87) | |
Gender | Male | 10 | 14 |
Female | 2 | 15 | |
Joint | Hip | 4 | 17 |
Knee | 8 | 12 | |
Number of previous revisions | 0 previous | 5 | 20 |
1 | 5 | 4 | |
2 | 1 | 3 | |
3 | 0 | 0 | |
4 | 1 | 0 | |
unknown | 0 | 2 |
Inter-observer consensus
Analysis for prediction of failure
Condition
|
Number cases
|
Number controls
|
P value
|
Odds ratio(OR)
|
95% C.I. for OR
| |
---|---|---|---|---|---|---|
N = 12
|
N = 29
| Lower | Upper | |||
Metal remaining | 1 (8.3%) | 0 (0%) | 1.0 | 1 x 1010
| 0 | ∞ |
New metal | 1 (8.3%) | 0 (0%) | 1.0 | 1 x 1010
| 0 | ∞ |
Cement | 4 (33.3%) | 9 (31%) | 0.909 | 1.134 | 0.132 | 9.739 |
Restrictor | 2 (16.7%) | 4 (13.8%) | 0.404 | 3.449 | 0.189 | 63.108 |
New fracture | 3 (25%) | 5 (17.2%) | 0.654 | 0.481 | 0.020 | 11.807 |
Antimicrobial device | 1 (8.3%) | 3 (10.3%) | 0.932 | 0.865 | 0.031 | 24.047 |
Drain | 3 (25%) | 4 (13.8%) | 0.345 | 3.108 | 0.296 | 32.623 |