Table 4.
Results of multiple regression model of knee prosthesis revision due to infection.
| Failures/Implants | Unadjusted (95% CI) |
Adjusted for all variables* (95% CI) |
P (adjusted model) |
|
| Gender | p = 0.228 | |||
| Female | 40/7454 | 1 (referent) | 1(referent) | |
| Male | 18/2281 | 1.53 (0.87–2.66) |
1.41 (0.81–2.48) |
|
| Insert | p = 0.002 | |||
| Fixed | 31/6924 | 1 (referent) | 1 (referent) | |
| Mobile | 27/2811 | 2.26 (1.35–3.78) |
2.28 (1.36–3.82) |
|
| Age at surgery (for year) |
58/9735 | 0.95 (0.92–0.99) |
0.95 0.92–0.99) |
p = 0.008 |
| Body mass index | p = 0.851 | |||
| Normal (BMI <= 25) | 10/1840 | 1 (referent) | 1 (referent) | |
| Overweight (25 < BMI <= 30) | 31/4692 | 1.24 (0.61–2.53) |
1.17 (0.57–2.38) |
p = 0.67 |
| Obese (30 < BMI <= 40) | 16/3031 | 1.01 (0.46–2.22) |
0.89 (0.40–1.98) |
p = 0.78 |
| Morbid obese (BMI > 40) | 1/172 | 1.15 (0.15–8.99) |
0.94 (0.12–7.49) |
p = 0.96 |
* Gender, type of insert, age at surgery, body mass index