title: Risk factors for anterior cruciate ligament injury: assessment of tibial plateau anatomic variables on conventional MRI using a new combined method.
abstract: OBJECTIVE
  The purpose of this study was to assess, in anterior cruciate ligament (ACL)-injured and -uninjured population, tibial plateau anatomic variables [medial and lateral tibial plateau slopes (MTPS and LTPS) and medial tibial plateau depth (MTPD)] on conventional magnetic resonance imaging (MRI) using a novel combined method and to determine whether these variables are risk factors for ACL injury.
  
  
  METHODS
  Seventy-three isolated ACL-injury patients (20 women and 53 men) were compared with 51 control group patients (19 women and 32 men).
  
  
  RESULTS
  The combined method had very high interrater and intrarater reliability compared with previously described methods. LTPS was significantly steeper in the overall injured group and injured men compared with the control group, with odds ratio (OR) of 3.031 and 5.89, respectively. Women with ACL injury had significantly shallower MTPD than uninjured women, with OR of 4.13.
  
  
  CONCLUSIONS
  We conclude that the new combined method is accurate and reproducible for assessing the tibial plateau anatomy. Women with shallower MTPD and men with steeper LTPS are at higher risk of sustaining ACL injury. Overall, steeper LTPS is a significant risk factor for sustaining ACL injury.
authors.affiliation: Center for Joint Disease, Department of Orthopedics, Chonnam National University Hwasun Hospital, 160 Ilsim-ri, Hwasun-eup, Hwasun-gun, Jeonnam 519-809, South Korea.
authors.forename: Mohammad Shahnawaz
authors.initials: MS
authors.lastname: Khan
authors.forename: Jong Keun
authors.initials: JK
authors.lastname: Seon
authors.forename: Eun Kyoo
authors.initials: EK
authors.lastname: Song
mesh_terms: D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000473:pathology* / Q000503:physiopathology; D000070598:Anterior Cruciate Ligament Injuries; D002356:Cartilage / Q000293:injuries / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D013708:Tendon Injuries / Q000175:diagnosis* / Q000209:etiology; D013977:Tibia / Q000293:injuries / Q000473:pathology*; D055815:Young Adult