Number knee replacements (%) | OR | Adjusted OR (95% CI)*† | |
---|---|---|---|

*Multivariable logistic regression adjusting for age, gender, BMI, % tibial cartilage loss, WOMAC score and bone size. | |||

†p = 0.02 for trend. | |||

CI, confidence interval; OR, odds ratio. | |||

Rate of tibial cartilage loss <3% per annum (n = 37) | 3 (8.1) | 1 | 1 |

Rate of tibial cartilage loss 3–8% per annum (n = 40) | 7 (17.5) | 2.4 | 2.3 (0.4 to 12.2) |

Rate of tibial cartilage loss >8% per annum (n = 36) | 8 (22.2) | 3.2 | 7.1 (1.4 to 36.5) |