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Survival analysis for date of revision, using the Kaplan-Meier method. The mean time between primary and revision THA was 9.6 ± 7.0 years (yellow line) for all revisions. The mean time was longer in 2016-2020 (green line, 10.2 ± 6.8 years) than in 2011-2015 (blue line, 8.8 ± 7.0 years, P=0.003).
