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Profile plots of Tegner scores over time by age. The model for the time trajectory for the Tegner activity scale between males and females (gender: male = 1, female = 0) was as follows: Tegner = 3.73 − 0.001 (years since surgery) − 0.002 (years-squared) + 0.7 (gender) + 0.035 (years*gender) + 0.0006 (years-squared*gender).
