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Kaplan-Meier analysis with hydroxyapatite (HA) coating as the independent factor and stem revision due to aseptic loosening as the endpoint. 10-year survival was 99.8% (CI: 99.6–100) for the HA-coated stems (red) and 99.4% (CI: 98.8–100) for the uncoated stems (black). The dashed lines represent 95% CIs for the 2 groups of stems (p = 0.23).
