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5- and 10-year cumulative failure for patients with and without history of previous surgery. 5-year cumulative failure (yes vs. no) was 6.6% (CI 5.1–8.5) vs. 3.3% (CI 2.7–4.0). 10-year cumulative failure was 8.4% (CI 6.6–11) vs. 4.5% (CI 3.8–5.4).
