Table 3.

Cumulated fracture rate in different datasets

Dataset	N Observed implants	N Documented fractures	Fracture rate per 100,000 implants	Failure rate per 100.000 observed component years	CI
Registers	733,036	2,227	304	38.50	38.41–38.58
AAHKS survey	64,483	355	550	16.71	16.66–16.76
Clinical studies	34,436	353	1.025	60.02	59.97–60.07