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Published in final edited form as: Ann Thorac Surg. 2019 Dec 23;110(2):500–507. doi: 10.1016/j.athoracsur.2019.10.085

Figure 2: — Cumulative incidence (CI) of reoperation after implantation of Freestyle valve in different age group adjusting death and reoperation for other reasons as a competing factor. A: patients grouped by age with incremental of 10 years: 20–30(28 patients), 31–40(90 patients), 41–50(204 patients), 51–60(353 patients), 61–70(574 patients), 71–80(537 patients), and >80(161 patients). Among the patients <60 years, there was no significant difference in CI of reoperation by age cohort (20–30 vs. 31–40 vs. 41–50 vs. 51–60). There was significant difference of CI in patients of 51–60 vs. 61–70, p<0.0001, 61–70 vs. 71–80, p<0.01, but no significant difference 71–80 vs. >80 years. B: patients grouped by age <40 years (105 patients), 40–59 years (528 patients), 60–74 years (860 patients), and ≥75 (454 patients) years. There was significant difference in CI of reoperation in patients of age <40 vs 60–74 p<0.0001, <40 vs ≥75 p=0.001, 40–59 vs 60–74 p<0.0001, and 40–59 vs ≥75 p=0.003, but no significant difference between <40 vs 40–59, and 60–74 vs ≥75.

Figure 2: — Cumulative incidence (CI) of reoperation after implantation of Freestyle valve in different age group adjusting death and reoperation for other reasons as a competing factor. A: patients grouped by age with incremental of 10 years: 20–30(28 patients), 31–40(90 patients), 41–50(204 patients), 51–60(353 patients), 61–70(574 patients), 71–80(537 patients), and >80(161 patients). Among the patients <60 years, there was no significant difference in CI of reoperation by age cohort (20–30 vs. 31–40 vs. 41–50 vs. 51–60). There was significant difference of CI in patients of 51–60 vs. 61–70, p<0.0001, 61–70 vs. 71–80, p<0.01, but no significant difference 71–80 vs. >80 years. B: patients grouped by age <40 years (105 patients), 40–59 years (528 patients), 60–74 years (860 patients), and ≥75 (454 patients) years. There was significant difference in CI of reoperation in patients of age <40 vs 60–74 p<0.0001, <40 vs ≥75 p=0.001, 40–59 vs 60–74 p<0.0001, and 40–59 vs ≥75 p=0.003, but no significant difference between <40 vs 40–59, and 60–74 vs ≥75.