1 Gender-based Differences In Outcome After Anatomic Double-Bundle Anterior

2 Background: Although previous studies suggested that female patients are predisposed to increase graft laxity compared with male patients after single-bundle anterior cruciate ligament (ACL) reconstruction using autogenous hamstring tendons, there have been no studies specifically examining gender-based differences in outcome after anatomical double-bundle ACL reconstruction with hamstring tendon autografts. Hypotheses: 1) Female patients would have significantly smaller hamstring graft diameters than did men for anatomical double-bundle ACL reconstruction surgery; 2) Female patients would have increased graft laxity compared with male patients after anatomical double-bundle ACL reconstruction using autogenous hamstring tendons. Study Design: Cohort study Methods: The consecutive 174 patients who underwent anatomical double-bundle ACL reconstruction using autogenous hamstring tendons were enrolled. Of these subjects