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Profile plots of Lysholm scores2 over time by gender. The model for the time trajectory for the Lysholm score between males and females (gender: male = 1, female = 0) was as follows: Lysholm-squared = 4954 + 435 (years since surgery) − 45 (years-squared) + 408 (gender) − 10.6 (years*gender) + 1.3 (years-squared*gender).
