This 21-year population-based cohort used the Rochester Epidemiology Project to define the general-population incidence of isolated ACL tears. It asks how often ACL tears occur, how incidence varies by age and sex, and how reconstruction rates changed over two decades.
Memorize the headline number: isolated ACL tears occur at roughly 69 per 100,000 person-years in the general population. This is the population-based denominator, distinct from the higher rates reported in select athletic cohorts.
The sex-specific age peaks are testable and clinically useful. Expect ACL injury in females during the high school window (14-18) and in males a few years later (19-25), tracking with sports participation.
The paper's central teaching point: rising ACL reconstruction volume does not mean rising injury rates. Injury incidence declined in males and was stable in females, yet surgery rates climbed across all ages. Use this to separate epidemiology from treatment-pattern shifts.
The near-universal reconstruction rate in patients under 18 (98.3%) reflects a strong bias toward surgery in skeletally immature and young patients, consistent with concern for meniscal and chondral protection. Finally, the 60% concurrent meniscal injury rate is a reminder to scrutinize the menisci on MRI and at arthroscopy in every acute ACL tear.
This 21-year population-based cohort used the Rochester Epidemiology Project to define the general-population incidence of isolated ACL tears. It asks how often ACL tears occur, how incidence varies by age and sex, and how reconstruction rates changed over two decades.
Memorize the headline number: isolated ACL tears occur at roughly 69 per 100,000 person-years in the general population. This is the population-based denominator, distinct from the higher rates reported in select athletic cohorts.
The sex-specific age peaks are testable and clinically useful. Expect ACL injury in females during the high school window (14-18) and in males a few years later (19-25), tracking with sports participation.
The paper's central teaching point: rising ACL reconstruction volume does not mean rising injury rates. Injury incidence declined in males and was stable in females, yet surgery rates climbed across all ages. Use this to separate epidemiology from treatment-pattern shifts.
The near-universal reconstruction rate in patients under 18 (98.3%) reflects a strong bias toward surgery in skeletally immature and young patients, consistent with concern for meniscal and chondral protection. Finally, the 60% concurrent meniscal injury rate is a reminder to scrutinize the menisci on MRI and at arthroscopy in every acute ACL tear.