Table 2.

Lifetime revision risk point estimates from different models (95% confidence interval)

Age at UKR	55	65	75	85
Exponential*	14.9% (12–19%)	10.7% (8–13%)	6.8% (5–9%)	3.7% (3–5%)
Gompertz	22.5% (11–55%)	14.1% (8–28%)	7.8% (5–13%)	3.8% (3–5%)
Weibull	16.2% (12–24%)	11.5% (9–17%)	7.1% (6–11%)	3.8% (3–5%)
Log logistic	15.5% (11–26%)	11.1% (8–17%)	7.0% (5–10%)	3.8% (3–5%)
Log Normal	12.5% (10–19%)	9.6% (7–14%)	6.6% (5–10%)	3.8% (3–5%)
Generalised Gamma	16.0% (12–24%)	11.4% (9–18%)	7.1% (6–10%)	3.8% (3–5%)

UKR unicompartmental knee replacement

*The exponential distribution was used for the base-case analysis