Retrospective cohort of 256 patients examining whether hamstring autograft diameter and patient age predict early ACL revision after primary reconstruction. Both were independent predictors on multivariate analysis. Mean follow-up was 14 months, so findings apply specifically to the early remodeling window.
8 mm: 1.7%
A 17-year-old soccer player is booked for hamstring autograft ACL reconstruction. If her graft measures ≤8 mm on the back table, her revision risk exceeds 16% in the first year. If it is ≤7 mm, that climbs to 24%.
This paper gives you two concrete decision points. First, measure graft diameter before drilling tunnels. If it falls short, consider harvesting the contralateral semitendinosus, switching to patellar or quadriceps tendon, or at minimum counseling the patient explicitly about elevated risk. Second, stop anchoring on female sex as the risk factor: the data show sex is a proxy for graft diameter, not an independent driver.
The size effect is confined to the early remodeling window. Animal data confirm graft cross-sectional area equalizes around 6 months regardless of starting diameter, which is precisely why this paper captures early revisions rather than long-term outcomes.
The age effect (OR nearly 19) reflects both higher reinjury rates from activity and lower tolerance for residual instability in adolescents — reinforcing why young athletes with marginal grafts deserve a frank preoperative conversation about graft choice.
Retrospective cohort of 256 patients examining whether hamstring autograft diameter and patient age predict early ACL revision after primary reconstruction. Both were independent predictors on multivariate analysis. Mean follow-up was 14 months, so findings apply specifically to the early remodeling window.
8 mm: 1.7%
A 17-year-old soccer player is booked for hamstring autograft ACL reconstruction. If her graft measures ≤8 mm on the back table, her revision risk exceeds 16% in the first year. If it is ≤7 mm, that climbs to 24%.
This paper gives you two concrete decision points. First, measure graft diameter before drilling tunnels. If it falls short, consider harvesting the contralateral semitendinosus, switching to patellar or quadriceps tendon, or at minimum counseling the patient explicitly about elevated risk. Second, stop anchoring on female sex as the risk factor: the data show sex is a proxy for graft diameter, not an independent driver.
The size effect is confined to the early remodeling window. Animal data confirm graft cross-sectional area equalizes around 6 months regardless of starting diameter, which is precisely why this paper captures early revisions rather than long-term outcomes.
The age effect (OR nearly 19) reflects both higher reinjury rates from activity and lower tolerance for residual instability in adolescents — reinforcing why young athletes with marginal grafts deserve a frank preoperative conversation about graft choice.