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Outcome of anterior cruciate ligament reconstruction with emphasis on sex-related differences


Corresponding author: Mattias Ahldén, MD, Department of Orthopaedics, Sahlgrenska University Hospital, Mölndal, SE-431 80 Mölndal, Sweden. E-mail:


The aim of this retrospective study was to compare the results after arthroscopic anterior cruciate ligament (ACL) reconstruction using the four-strand semitendinosus-gracilis (ST/G) autograft in male (n=141) vs female (n=103) patients. The patients were operated on between 1996 and 2005, using interference screw fixation and drilling the femoral tunnel through the anteromedial portal. The pre-operative assessments and demographics, apart from age (males 29 years, females 26 years; P=0.02), were comparable at the time of surgery. At 25 (23–36) months post-operatively, no significant differences were found between the study groups in terms of anterior side-to-side knee laxity, manual Lachman test, Tegner activity level, Lysholm knee score, range of motion or donor-site morbidity. Both study groups improved significantly in most clinical assessments and functional scores compared with their pre-operative values. Two years after ACL reconstruction using ST/G autografts, there were no significant differences between male and female patients in terms of clinical outcome or functional scores.