Patient-Reported Outcomes of Bicruciate Multiligament Versus Single Cruciate Multiligament Knee Injuries

Background:Multiligament knee injuries (MLKIs) are heterogeneous, and bicruciate knee ligament injuries are considered a serious form of this injury. The current literature tends not to distinguish between single and bicruciate MLKI when reporting outcomes.Purpose:To investigate patient-reported outcomes after surgical treatment of MLKI comparing single cruciate MLKI with bicruciate MLKI. The secondary aim was to investigate the influence of different factors on patient-reported outcomes after surgery.Study Design:Cohort study; Level of evidence, 3.Methods:This study was designed as a cross-sectional cohort study. Patients who underwent surgical treatment for MLKI at a single level 1 trauma center between January 2013 and December 2020 were included in this study. Patient-reported outcomes included the Tegner score, Lysholm score, International Knee Documentation Committee (IKDC) subjective knee form, Knee injury and Osteoarthritis Outcome Survey (KOOS), and a visual analog scale for pain.Results:Of the 191 patients meeting the inclusion criteria, 124 (65%) agreed to participate and had a complete data set with a follow-up time at a mean 74 ± 27 months. Patients with single cruciate MLKI (type I) had significantly higher scores for IKDC ( P = .007), Lysholm ( P = .012), KOOS Pain ( P = .04), KOOS Activities of Daily Living ( P = .01), KOOS Sport and Recreation ( P = .005), KOOS Quality of Life ( P = .04), KOOS4 (which considers the subscales of Pain, Symptoms, Sport and Recreation, and Quality of Life) ( P = .01), Tegner ( P = .04), and visual analog scale for pain during activity ( P = .004) when compared with patients with bicruciate MLKI (type II-type IV). Furthermore, age was significantly associated with a lower IKDC ( P = .001), and an increased severity of injury was significantly associated with IKDC ( P = .015), KOOS4 ( P = .022), and Lysholm ( P = .029) scores.Conclusion:MLKIs involving a single cruciate ligament had significantly higher patient-reported postoperative outcome measures compared with bicruciate MLKIs. Age and type of injury were important predictors for outcomes. Patients presenting with dislocated knees had lower patient-reported outcomes; however, there was no significant difference in outcomes between bicruciate MLKIs and patients presenting with dislocated knees.