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Tomihara T, Hashimoto Y, Okazaki S, Nishino K, Taniuchi M, Takigami J, Tsumoto S, Katsuda H. Bone-patellar tendon-bone autograft is associated with a higher rate of return to preinjury levels of performance in high-level athletes than anterior cruciate ligament reconstruction using hamstring autograft. Knee Surg Sports Traumatol Arthrosc 2024; 32:1384-1395. [PMID: 38558484 DOI: 10.1002/ksa.12144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/26/2024] [Accepted: 02/29/2024] [Indexed: 04/04/2024]
Abstract
PURPOSE Return to preinjury levels of performance (RTP) is the main goal after anterior cruciate ligament reconstruction (ACL-R) for athletes when ACL graft rupture is a career-threatening event. The purpose of this study was to elucidate the associated factors for RTP and subsequent ACL injury after ACL-R using bone-patellar tendon-bone (BPTB) or hamstring (HT) autograft in high-level athletes with a minimum postoperative follow-up of 24 months. METHODS This retrospective study included 157 patients who had preinjury Tegner activity level of 9 and underwent primary ACL-R using BPTB (average age, 16.9 years; 35 males and 36 females) or HT (average age, 17.2 years; 49 males and 37 females). The mean follow-ups were 33.6 months in BPTB and 44.5 months in HT, respectively. The data were obtained based on routine clinical follow-ups and telephone interviews performed by the surgeon. Multivariate logistic regression analysis was conducted to determine the association of patient variables with RTP and subsequent ACL injury. RESULTS Ninety-nine patients (63.1%) were able to RTP. The rate of RTP in BPTB (74.6%) was significantly higher than that of HT (53.5%) (p < 0.05). The overall average timing of RTP after ACL-R was 10.0 months while that was significantly earlier in BPTB (9.7 months) than in HT (10.5 months) (p < 0.05). Twenty-three (14.6%) and 21 patients (13.4%) had ACL graft ruptures and ACL injuries in the contralateral knees, respectively. Multivariate analyses showed that BPTB (odds ratio [OR], 2.590; 95% confidence interval [CI], 1.300-5.160; p = 0.007) was associated with a higher potential for RTP after ACL-R. The incidence of ACL graft rupture after ACL-R decreased with BPTB (OR, 0.861; 95% CI, 0.770-0.962; p = 0.009). CONCLUSIONS The use of BPTB autograft was associated with a higher rate of RTP and a lower incidence of ACL graft rupture compared to ACL-R using HT autograft. LEVEL OF EVIDENCE Level IV, retrospective case series.
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Affiliation(s)
- Tomohiro Tomihara
- Department of Orthopaedic Surgery, Shimada Hospital, Habikino, Japan
| | - Yusuke Hashimoto
- Department of Sport Sciences, Osaka University of Health and Sport Sciences, Sennan-gun, Japan
| | - Shiro Okazaki
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Habikino, Japan
| | - Kazuya Nishino
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Habikino, Japan
| | | | - Junsei Takigami
- Department of Orthopaedic Surgery, Shimada Hospital, Habikino, Japan
| | - Shuko Tsumoto
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Habikino, Japan
| | - Hiroshi Katsuda
- Department of Orthopaedic Surgery, Shimada Hospital, Habikino, Japan
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Zeitlin J, Fontana MA, Parides MK, Nawabi DH, Wickiewicz TL, Pearle AD, Beynnon BD, Imhauser CW. Key Thresholds and Relative Contributions of Knee Geometry, Anteroposterior Laxity, and Body Weight as Risk Factors for Noncontact ACL Injury. Orthop J Sports Med 2023; 11:23259671231163627. [PMID: 37197036 PMCID: PMC10184233 DOI: 10.1177/23259671231163627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 01/27/2023] [Indexed: 05/19/2023] Open
Abstract
Background Limited data exist regarding the association of tibiofemoral bony and soft tissue geometry and knee laxity with risk of first-time noncontact anterior cruciate ligament (ACL) rupture. Purpose To determine associations of tibiofemoral geometry and anteroposterior (AP) knee laxity with risk of first-time noncontact ACL injury in high school and collegiate athletes. Study Design Cohort study; Level of evidence, 2. Methods Over a 4-year period, noncontact ACL injury events were identified as they occurred in 86 high school and collegiate athletes (59 female, 27 male). Sex- and age-matched control participants were selected from the same team. AP laxity of the uninjured knee was measured using a KT-2000 arthrometer. Magnetic resonance imaging was taken on ipsilateral and contralateral knees, and articular geometries were measured. Sex-specific general additive models were implemented to investigate associations between injury risk and 6 features: ACL volume, meniscus-bone wedge angle in the lateral compartment of the tibia, articular cartilage slope at the middle region of the lateral compartment of the tibia, femoral notch width at the anterior outlet, body weight, and AP displacement of the tibia relative to the femur. Importance scores (in percentages) were calculated to rank the relative contribution of each variable. Results In the female cohort, the 2 features with the highest importance scores were tibial cartilage slope (8.6%) and notch width (8.1%). In the male cohort, the 2 top-ranked features were AP laxity (5.6%) and tibial cartilage slope (4.8%). In female patients, injury risk increased by 25.5% with lateral middle cartilage slope becoming more posteroinferior from -6.2° to -2.0° and by 17.5% with lateral meniscus-bone wedge angle increasing from 27.3° to 28.2°. In males, an increase in AP displacement from 12.5 to 14.4 mm in response to a 133-N anterior-directed load was associated with a 16.7% increase in risk. Conclusion Of the 6 variables studied, there was no single dominant geometric or laxity risk factor for ACL injury in either the female or male cohort. In males, AP laxity >13 to 14 mm was associated with sharply increased risk of noncontact ACL injury. In females, lateral meniscus-bone wedge angle >28° was associated with a sharply decreased risk of noncontact ACL injury.
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Affiliation(s)
- Jacob Zeitlin
- Weill Cornell Medical College, New York, New York, USA
- Department of Biomechanics Research, Hospital for Special Surgery, New York, New York, USA
- Jacob Zeitlin, BA, Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065, USA ()
| | - Mark A. Fontana
- Weill Cornell Medical College, New York, New York, USA
- Center for Analytics, Modeling, and Performance, Hospital for Special Surgery, New York, New York, USA
| | - Michael K. Parides
- Biostatistics and Bioinformatics Program, Hospital for Special Surgery, New York, New York, USA
| | - Danyal H. Nawabi
- Department of Biomechanics Research, Hospital for Special Surgery, New York, New York, USA
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Thomas L. Wickiewicz
- Department of Biomechanics Research, Hospital for Special Surgery, New York, New York, USA
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Andrew D. Pearle
- Department of Biomechanics Research, Hospital for Special Surgery, New York, New York, USA
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Bruce D. Beynnon
- Department of Orthopaedics and Rehabilitation, Larner College of Medicine, University of Vermont, Burlington, Vermont, USA
| | - Carl W. Imhauser
- Department of Biomechanics Research, Hospital for Special Surgery, New York, New York, USA
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Beynnon BD, Tourville TW, Hollenbach HC, Shultz S, Vacek P. Intrinsic Risk Factors for First-Time Noncontact ACL Injury: A Prospective Study of College and High School Athletes. Sports Health 2023; 15:433-442. [PMID: 36154754 PMCID: PMC10170220 DOI: 10.1177/19417381221121136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND A comprehensive understanding of the intrinsic risk factors for anterior cruciate ligament (ACL) disruption is important for identifying individuals at increased risk for suffering this trauma and developing interventions to mitigate risk. HYPOTHESIS A variety of risk factors predispose athletes to first-time, noncontact ACL injury and some of these differ between male and female athletes. STUDY DESIGN Prospective cohort study with nested case-control sampling. LEVEL OF EVIDENCE Level 2. METHODS Sport teams at 28 high schools and 8 colleges were monitored prospectively over 4 years, and 109 of 130 athletes who suffered their first noncontact ACL injury participated in the study. At the time of injury, matched control subjects were randomly selected from among the case's teammates and a total of 227 athletes participated. Demographic characteristics, joint laxity, lower extremity alignment, strength, and personality characteristics were measured. The association of each risk factor with injury risk was assessed by conditional logistic regression. RESULTS The risk factors that were associated with ACL injury in both male and female athletes included having a parent with prior ACL injury and increases of the following variables: body weight, anterior displacement of the tibia relative to the femur, genu recurvatum, and generalized joint laxity. Risk factors that are unique to female athletes included increased body mass index, increased trunk flexion strength, and prior non-ACL knee injury. The risk factors specific to male athletes were decreased standing quadriceps angle, decreased hip adduction strength, and chronic disease. CONCLUSION A diverse set of risk factors predispose both male and female athletes to ACL injury, whereas others appear to be sex-specific. CLINICAL RELEVANCE Different approaches for assessing risk and preventing ACL injury are needed for male and female athletes. In addition, personalized prevention strategies may be needed to target the specific characteristics that place an individual at increased risk of suffering this trauma.
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Affiliation(s)
- Bruce D. Beynnon
- Department of Orthopedics and
Rehabilitation, Robert Larner College of Medicine, University of Vermont,
Burlington, Vermont
- Department of Electrical and Biomedical
Engineering, University of Vermont, Burlington, Vermont
| | - Timothy W. Tourville
- Department of Orthopedics and
Rehabilitation, Robert Larner College of Medicine, University of Vermont,
Burlington, Vermont
- Department of Rehabilitation and
Movement Science, College of Nursing and Health Sciences, University of Vermont,
Burlington, Vermont
| | - Helen C. Hollenbach
- Department of Orthopedics and
Rehabilitation, Robert Larner College of Medicine, University of Vermont,
Burlington, Vermont
| | - Sandy Shultz
- Department of Kinesiology, School of
Health and Human Sciences, University of North Carolina at Greensboro, Greensboro,
North Carolina
| | - Pamela Vacek
- Department of Medical Biostatistics,
Robert Larner College of Medicine, University of Vermont, Burlington, Vermont
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Ye Z, Wu X, Chen J, Cho E, Xie G, Dong S, Xu J, Zhao J. Association Between Anterior Tibial Subluxation of Lateral Compartment and High-Grade Knee Laxity in Patients With Anterior Cruciate Ligament Deficiency. Am J Sports Med 2023:3635465231166712. [PMID: 37092733 DOI: 10.1177/03635465231166712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
BACKGROUND High-grade knee laxity and excessive anterior tibial subluxation (ATS) are correlated with poor clinical outcomes in patients with anterior cruciate ligament (ACL) deficiency and share similar risk factors; however, the association between excessive ATS and high-grade knee laxity remains unclear. PURPOSE To identify the association between excessive ATS and high-grade knee laxity in patients with ACL deficiency and determine the possibility that ATS can predict high-grade knee laxity. STUDY DESIGN Cross-sectional study; Level of evidence, 3. METHODS A total of 226 patients who underwent ACL reconstruction between May 2018 and March 2022 were analyzed in the present study; the high-grade group consisted of 113 patients who had a grade 3 result on the preoperative anterior drawer test, Lachman test, or pivot-shift test while under anesthesia, and the low-grade group consisted of 113 matched patients. The ATS values for medial and lateral compartments (ATSMC and ATSLC) were measured on magnetic resonance imaging while patients relaxed the quadriceps in the supine position under no anesthesia. The optimal cutoff values of ATSMC and ATSLC for high-grade knee laxity were determined using receiver operating characteristic curves. Univariate and multivariate logistic regression analyses with stratification were performed to identify the association between excessive ATS and high-grade knee laxity. RESULTS Compared with the low-grade group, the high-grade group had a longer time from injury to surgery; higher rates of medial meniscus posterior horn tear (MMPHT), lateral meniscus posterior horn tear (LMPHT), and anterolateral ligament (ALL) abnormality; and larger lateral tibial slope, ATSMC, and ATSLC. The optimal cutoff value was 2.6 mm (sensitivity, 52.2%; specificity, 76.1%) for ATSMC and 4.5 mm (sensitivity, 67.3%; specificity, 64.6%) for ATSLC in predicting high-grade knee laxity. After adjustment for covariates, ATSLC ≥4.5 mm (odds ratio [OR], 2.94; 95% CI, 1.56-5.55; P = .001), MMPHT (OR, 2.62; 95% CI, 1.35-5.08; P = .004), LMPHT (OR, 2.39; 95% CI, 1.20-4.78; P = .014), and ALL abnormality (OR, 2.09; 95% CI, 1.13-3.89; P = .019) were associated with high-grade knee laxity. The association between excessive ATSLC and high-grade knee laxity was validated in patients with acute ACL injury as well as those with chronic ACL injury. CONCLUSION Excessive ATSLC was associated with high-grade knee laxity in patients who had ACL deficiency, with a predictive cutoff value of 4.5 mm. This study may help surgeons estimate the degree of knee instability more accurately before anesthesia and may facilitate preliminary surgical decision-making, such as appropriate graft choices and consideration of extra-articular augmentation.
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Affiliation(s)
- Zipeng Ye
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiulin Wu
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiebo Chen
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Eunshinae Cho
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guoming Xie
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shikui Dong
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Junjie Xu
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinzhong Zhao
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Straub RK, Powers CM. Is muscular strength a predictor for primary or secondary ACL injury? A scoping review of prospective studies. Phys Ther Sport 2023; 61:91-101. [PMID: 36965459 DOI: 10.1016/j.ptsp.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/27/2023]
Abstract
OBJECTIVE To identify strength-related risk factors of ACL injury by conducting a scoping review of the peer-reviewed literature. METHODS PubMed and EBSCO host (CINAHL Complete, MEDLINE Complete, SPORTDiscus) were searched from inception to August 2022. Prospective studies that examined strength strength-related risk factors for ACL injury (primary and secondary) were included. PRISMA Extension for Scoping Reviews guided data charting/extraction. RESULTS 17 studies were included (eight primary ACL injury, nine secondary ACL injury). Knee flexor strength was the most studied predictor (10 studies), followed by hip abductor strength (9 studies). Across studies, measures of muscle performance were inconsistent. Significant strength-related risk factors were reported in seven of 17 studies. Potential strength-related risk factors of primary ACL injury included measures of hip strength (abductor or external rotator) and knee strength (knee flexor/extensor ratio and knee extensor strength symmetry) for secondary ACL injury. Limited/conflicting evidence was found for all strength-related risk factors. CONCLUSION Measures of muscle strength appear to be predictive of primary and secondary ACL injury in a subset of identified studies. The heterogeneity of study designs and lack of standardization related to strength testing make it difficult to determine the overall impact of strength in predicting ACL injury.
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Affiliation(s)
- Rachel K Straub
- University of Southern California, Division of Biokinesiology & Physical Therapy, Los Angeles, CA, USA
| | - Christopher M Powers
- University of Southern California, Division of Biokinesiology & Physical Therapy, Los Angeles, CA, USA.
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Ye Z, Zhang T, Wu C, Qiao Y, Su W, Chen J, Xie G, Dong S, Xu J, Zhao J. Predicting the Objective and Subjective Clinical Outcomes of Anterior Cruciate Ligament Reconstruction: A Machine Learning Analysis of 432 Patients. Am J Sports Med 2022; 50:3786-3795. [PMID: 36285651 DOI: 10.1177/03635465221129870] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Sports levels, baseline patient-reported outcome measures (PROMs), and surgical procedures are correlated with the outcomes of anterior cruciate ligament reconstruction (ACLR). Machine learning may be superior to conventional statistical methods in making repeatable and accurate predictions. PURPOSE To identify the best-performing machine learning models for predicting the objective and subjective clinical outcomes of ACLR and to determine the most important predictors. STUDY DESIGN Case-control study; Level of evidence, 3. METHODS A total of 432 patients who underwent anatomic double-bundle ACLR with hamstring tendon autograft between January 2010 and February 2019 were included in the machine learning analysis. A total of 15 predictive variables and 6 outcome variables were selected to validate the logistic regression, Gaussian naïve Bayes machine, random forest, Extreme Gradient Boosting (XGBoost), isotonically calibrated XGBoost, and sigmoid calibrated XGBoost models. For each clinical outcome, the best-performing model was determined using the area under the receiver operating characteristic curve (AUC), whereas the importance and direction of each predictive variable were demonstrated in a Shapley Additive Explanations summary plot. RESULTS The AUC and accuracy of the best-performing model, respectively, were 0.944 (excellent) and 98.6% for graft failure; 0.920 (excellent) and 91.4% for residual laxity; 0.930 (excellent) and 91.0% for failure to achieve the minimal clinically important difference (MCID) of the Lysholm score; 0.942 (excellent) and 95.1% for failure to achieve the MCID of the International Knee Documentation Committee (IKDC) score; 0.773 (fair) and 70.5% for return to preinjury sports; and 0.777 (fair) and 69.2% for return to pivoting sports. Medial meniscal resection, participation in competitive sports, and steep posterior tibial slope were top predictors of graft failure, whereas high-grade preoperative knee laxity, long follow-up period, and participation in competitive sports were top predictors of residual laxity. High preoperative Lysholm and IKDC scores were highly predictive of not achieving the MCIDs of PROMs. Young age, male sex, high preoperative IKDC score, and large graft diameter were important predictors of return to preinjury or pivoting sports. CONCLUSION Machine learning analysis can provide reliable predictions for the objective and subjective clinical outcomes (graft failure, residual laxity, PROMs, and return to sports) of ACLR. Patient-specific evaluation and decision making are recommended before and after surgery.
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Affiliation(s)
- Zipeng Ye
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tianlun Zhang
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chenliang Wu
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi Qiao
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Su
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiebo Chen
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guoming Xie
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shikui Dong
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Junjie Xu
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinzhong Zhao
- Department of Sports Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Nie S, Chen J, Zhang H, Zhao P, Huang W. Tibial Spine Height Measured by Radiograph Is a Risk Factor for Non-Contact Anterior Cruciate Ligament Injury in Males: A Retrospective Case-Control Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15589. [PMID: 36497662 PMCID: PMC9740213 DOI: 10.3390/ijerph192315589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Various anatomic abnormalities are implicated in non-contact anterior cruciate ligament (ACL) injury, but researchers rarely deal with the relation between tibial spine height and ACL injury. We conducted a retrospective case-control study to include 96 patients with and without non-contact ACL injuries. Tibial plateau width (TPW), medial and lateral tibial spine height (MTSH and LTSH), and tibial spine width (TSW) were measured by radiographs. The parameters were compared among subgroups. Binary regression mode, receiver operating characteristic curves, and the area under the curve (AUC) were used to evaluate the specific correlation of the parameters with ACL injury. As a result, we found that the ratio of LTSH/TPW was larger in ACL-injured patients than in ACL-intact controls (p = 0.015). In the study group, LTSH/TPW (p = 0.007) and MTSH/TPW (p = 0.002) were larger in males than in females. The ratio of LTSH/TPW had an AUC of 0.60 and a significant OR of 1.3 for ACL injury in males, but not in females. In conclusion, LTSH was larger in patients with ACL injury and is a risk factor for ACL injury in males. The impact of increased LTSH on the impingement between the grafts and lateral tibial spine during ACL reconstruction warrants further investigation.
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Affiliation(s)
- Shixin Nie
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Orthopedic Laboratory of Chongqing Medical University, Chongqing 400016, China
| | - Jiaxing Chen
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Orthopedic Laboratory of Chongqing Medical University, Chongqing 400016, China
| | - Hua Zhang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Orthopedic Laboratory of Chongqing Medical University, Chongqing 400016, China
| | - Pei Zhao
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Orthopedic Laboratory of Chongqing Medical University, Chongqing 400016, China
| | - Wei Huang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
- Orthopedic Laboratory of Chongqing Medical University, Chongqing 400016, China
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Ye Z, Xu J, Chen J, Qiao Y, Wu C, Xie G, Dong S, Zhao J. Steep lateral tibial slope measured on magnetic resonance imaging is the best radiological predictor of anterior cruciate ligament reconstruction failure. Knee Surg Sports Traumatol Arthrosc 2022; 30:3377-3385. [PMID: 35220454 DOI: 10.1007/s00167-022-06923-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 02/11/2022] [Indexed: 10/19/2022]
Abstract
PURPOSE To identify the radiological predictive risk factors for anterior cruciate ligament reconstruction (ACLR) failure, compare the diagnostic accuracies of different parameters of conventional radiographs and magnetic resonance imaging (MRI), and determine the cutoff values for patients at higher risk. METHODS Twenty-eight patients who were diagnosed as ACLR failure via MRI or arthroscopic examination were included in the study group. They were matched to 56 patients who underwent primary ACLR with the same surgical technique and without graft failure at the minimum 24-month follow-up by age, sex, and body mass index. On true lateral whole-leg radiographs, the posterior tibial slope (PTS) referenced to the tibial mechanical axis (PTS-mechanical), PTS referenced to the tibial proximal anatomical axis (PTS-anatomical), and anterior tibial translation (ATT) were measured. On the sagittal slices of MRI, the medial tibial slope (MTS), medial tibial plateau (MTP) subluxation (MTPsublx), lateral tibial slope (LTS), and lateral tibial plateau (LTP) subluxation (LTPsublx) were obtained. Receiver operator characteristic (ROC) curves were constructed to compare the diagnostic performance and determine the cutoff values of different radiological parameters. RESULTS The study group demonstrated higher values of PTS-mechanical (10.7° ± 2.9° vs 8.7° ± 1.9°, p = 0.003), PTS-anatomical (13.2° ± 2.8° vs 10.5° ± 2.5°, p < 0.001), ATT (10.7 ± 3.3 mm vs 8.9 ± 2.2 mm, p = 0.014), LTS (9.4° ± 2.1° vs 5.5° ± 2.5°, p < 0.001), and LTPsublx (8.2 ± 2.8 mm vs 6.8 ± 1.9 mm, p = 0.009) as compared with the control group. The area under the ROC curve of LTS was significantly larger than that of PTS-mechanical (p = 0.006) and PTS-anatomical (p = 0.020). Based on the maximum Youden indexes, the cutoff values of PTS-mechanical, PTS-anatomical, and LTS were 10.1° (sensitivity, 64.3%; specificity, 78.6%), 12.0° (sensitivity, 71.4%; specificity, 71.4%), and 7.7° (sensitivity, 85.7%; specificity, 80.4%), respectively. CONCLUSION Due to the morphological asymmetry of the MTP and LTP, steep LTS measured on MRI is the best radiological predictor of ACLR failure. Detailed measurement of the LTS on MRI is recommended to evaluate the risk of ACLR failure prior to the surgery. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Zipeng Ye
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Junjie Xu
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Jiebo Chen
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Yi Qiao
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Chenliang Wu
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Guoming Xie
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
| | - Shikui Dong
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
| | - Jinzhong Zhao
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
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Maruyama S, Sekine C, Shagawa M, Yokota H, Hirabayashi R, Togashi R, Yamada Y, Hamano R, Ito A, Sato D, Edama M. Menstrual Cycle Changes Joint Laxity in Females—Differences between Eumenorrhea and Oligomenorrhea. J Clin Med 2022; 11:jcm11113222. [PMID: 35683609 PMCID: PMC9181714 DOI: 10.3390/jcm11113222] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/29/2022] [Accepted: 06/03/2022] [Indexed: 01/27/2023] Open
Abstract
The purpose of this study was to investigate the changes in anterior knee laxity (AKL), stiffness, general joint laxity (GJL), and genu recurvatum (GR) during the menstrual cycle in female non-athletes and female athletes with normal and irregular menstrual cycles. Participants were 19 female non-athletes (eumenorrhea, n = 11; oligomenorrhea, n = 8) and 15 female athletes (eumenorrhea, n = 8; oligomenorrhea, n = 7). AKL was measured as the amount of anterior tibial displacement at 67 N–133 N. Stiffness was calculated as change in (Δ)force/Δ anterior displacement. The Beighton method was used to evaluate the GJL. The GR was measured as the maximum angle of passive knee joint extension. AKL, stiffness, GJL, and GR were measured twice in four phases during the menstrual cycle. Stiffness was significantly higher in oligomenorrhea groups than in eumenorrhea groups, although no significant differences between menstrual cycle phases were evident in female non-athletes. GR was significantly higher in the late follicular, ovulation, and luteal phases than in the early follicular phase, although no significant differences between groups were seen in female athletes. Estradiol may affect the stiffness of the periarticular muscles in the knee, suggesting that GR in female athletes may change during the menstrual cycle.
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Affiliation(s)
- Sae Maruyama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Chie Sekine
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Mayuu Shagawa
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Hirotake Yokota
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Ryo Hirabayashi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Ryoya Togashi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Yuki Yamada
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Rena Hamano
- Department of Health and Sports, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City 950-3198, Japan; (R.H.); (A.I.)
| | - Atsushi Ito
- Department of Health and Sports, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City 950-3198, Japan; (R.H.); (A.I.)
| | - Daisuke Sato
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
| | - Mutsuaki Edama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Niigata City 950-3198, Japan; (S.M.); (C.S.); (M.S.); (H.Y.); (R.H.); (R.T.); (Y.Y.); (D.S.)
- Correspondence: ; Tel./Fax: +81-25-257-4723
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Koca F, Fältström A, Cristiani R, Stålman A. Comparison of Knee Function and Activity Level Between Bilateral and Unilateral ACL Reconstruction: A Matched-Group Analysis With Minimum 5-Year Follow-up. Orthop J Sports Med 2022; 10:23259671221083576. [PMID: 35494496 PMCID: PMC9047869 DOI: 10.1177/23259671221083576] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/24/2021] [Indexed: 11/21/2022] Open
Abstract
Background: There is a lack of knowledge regarding knee function and activity level after
bilateral anterior cruciate ligament reconstruction (ACLR) at midterm
follow-up. Purpose: To compare activity level, patient-reported knee function, and quality of
life in patients with bilateral ACLR and matched controls with unilateral
ACLR at a minimum 5-year follow-up. Study Design: Cohort study; Level of evidence, 3. Methods: Patients with bilateral ACLR who were aged ≤40 years and had a second ACLR
performed between 2010 and 2015 were identified in the authors’ local
database. Surgical data and preoperative Knee injury and Osteoarthritis
Outcome Score (KOOS) were extracted. The patients were sent a letter with
questionnaires including the KOOS, EuroQol 5-Dimensions (EQ-5D), and EuroQol
visual analog scale (EQ-VAS) and were asked study-specific questions by
telephone regarding activity level and knee function at a minimum 5-year
follow-up. For every patient with bilateral ACLR, a control matched for age
±2 years, sex, year ACLR was performed, and preinjury activity level or
sport at the time of injury were identified in the database. Results: A total of 98 patients (mean age ± SD, 33.3 ± 7.3 years) with bilateral ACLR
and 98 patients with unilateral ACLR (mean age ± SD, 33.1 ± 7.7 years) were
included. The mean postoperative follow-up was 7.6 ± 1.8 years (from the
second ACLR) for patients with bilateral ACLR and 7.8 ± 1.7 years for
patients with unilateral ACLR. Patients with bilateral ACLR reported lower
scores on all KOOS subscales, the EQ-5D, and the EQ-VAS at follow-up
(P < .05). There was no difference in activity level
between the groups at follow-up, but patients with bilateral ACLR were less
satisfied with their activity level and knee function (P
< .05). Conclusion: Patient-reported knee function and health-related quality of life were
inferior in patients with bilateral ACLR compared with patients with
unilateral ACLR. Patients with bilateral ACLR cannot expect the same knee
function and quality of life as patients with unilateral ACLR.
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Affiliation(s)
- Firathan Koca
- Capio Artro Clinic, Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Anne Fältström
- Region Jönköping County, Rehabilitation Centre, Ryhov County Hospital, Jönköping, Sweden
- Unit of Physiotherapy, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Riccardo Cristiani
- Capio Artro Clinic, Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Anders Stålman
- Capio Artro Clinic, Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden
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11
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Screening Tests for Assessing Athletes at Risk of ACL Injury or Reinjury-A Scoping Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052864. [PMID: 35270563 PMCID: PMC8910677 DOI: 10.3390/ijerph19052864] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/25/2022] [Accepted: 02/26/2022] [Indexed: 12/23/2022]
Abstract
Various tests are available to assess athletes for factors associated with their susceptibility and risk of anterior cruciate ligament (ACL) injury or reinjury; however, it is unclear which tests are clinically meaningful and what should be considered when using them. Therefore, the aim of this scoping review was to screen and summarize testing and to derive evidence-based recommendations for clinicians, practitioners and future research. Five databases were searched to identify studies addressing musculoskeletal morphology or functional-performance-related screening tests with a clear conceptual link or an evidence-based relationship to ACL (re)injury. A quality rating was carried out using the National Institutes of Health (NIH) Study-Quality Assessment Tool. Six different categories of common screening tests were identified: balance and postural control, gait- and running-related tests, joint laxity, joint morphology and anthropometrics, jump tests and strength tests. Predicting future injury in a complex, dynamic system based on a single screening test is methodologically challenging, which is also reflected in the highly controversial findings in the literature regarding potential associations between specific screening tests and the occurrence of ACL injuries and reinjuries. Nonetheless, various screening tests can provide clinically relevant information on ACL-(re)injury-related factors and help to provide tailored preventive measures. A selection of corresponding evidence-based recommendations is derived and presented in this scoping review.
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12
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Martin RK, Wastvedt S, Pareek A, Persson A, Visnes H, Fenstad AM, Moatshe G, Wolfson J, Engebretsen L. Predicting Anterior Cruciate Ligament Reconstruction Revision: A Machine Learning Analysis Utilizing the Norwegian Knee Ligament Register. J Bone Joint Surg Am 2022; 104:145-153. [PMID: 34662318 DOI: 10.2106/jbjs.21.00113] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Several factors are associated with an increased risk of anterior cruciate ligament (ACL) reconstruction revision. However, the ability to accurately translate these factors into a quantifiable risk of revision at a patient-specific level has remained elusive. We sought to determine if machine learning analysis of the Norwegian Knee Ligament Register (NKLR) can identify the most important risk factors associated with subsequent revision of primary ACL reconstruction and develop a clinically meaningful calculator for predicting revision of primary ACL reconstruction. METHODS Machine learning analysis was performed on the NKLR data set. The primary outcome was the probability of revision ACL reconstruction within 1, 2, and/or 5 years. Data were split randomly into training sets (75%) and test sets (25%). Four machine learning models were tested: Cox Lasso, survival random forest, generalized additive model, and gradient boosted regression. Concordance and calibration were calculated for all 4 models. RESULTS The data set included 24,935 patients, and 4.9% underwent a revision surgical procedure during a mean follow-up (and standard deviation) of 8.1 ± 4.1 years. All 4 models were well-calibrated, with moderate concordance (0.67 to 0.69). The Cox Lasso model required only 5 variables for outcome prediction. The other models either used more variables without an appreciable improvement in accuracy or had slightly lower accuracy overall. An in-clinic calculator was developed that can estimate the risk of ACL revision (Revision Risk Calculator). This calculator can quantify risk at a patient-specific level, with a plausible range from near 0% for low-risk patients to 20% for high-risk patients at 5 years. CONCLUSIONS Machine learning analysis of a national knee ligament registry can predict the risk of ACL reconstruction revision with moderate accuracy. This algorithm supports the creation of an in-clinic calculator for point-of-care risk stratification based on the input of only 5 variables. Similar analysis using a larger or more comprehensive data set may improve the accuracy of risk prediction, and future studies incorporating patients who have experienced failure of ACL reconstruction but have not undergone subsequent revision may better predict the true risk of ACL reconstruction failure. LEVEL OF EVIDENCE Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- R Kyle Martin
- Department of Orthopedic Surgery, University of Minnesota, Minneapolis, Minnesota.,Department of Orthopedic Surgery, CentraCare, Saint Cloud, Minnesota
| | - Solvejg Wastvedt
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - Ayoosh Pareek
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Andreas Persson
- Department of Orthopedic Surgery, Martina Hansens Hospital, Bærum, Norway.,Norwegian Knee Ligament Register, Haukeland University Hospital, Bergen, Norway.,Oslo Sport Trauma Research Center, Norwegian School of Sports Science, Oslo, Norway
| | - Håvard Visnes
- Norwegian Knee Ligament Register, Haukeland University Hospital, Bergen, Norway
| | - Anne Marie Fenstad
- Norwegian Knee Ligament Register, Haukeland University Hospital, Bergen, Norway
| | - Gilbert Moatshe
- Oslo Sport Trauma Research Center, Norwegian School of Sports Science, Oslo, Norway.,Orthopaedic Clinic, Oslo University Hospital Ullevål, Oslo, Norway
| | - Julian Wolfson
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - Lars Engebretsen
- Oslo Sport Trauma Research Center, Norwegian School of Sports Science, Oslo, Norway.,Orthopaedic Clinic, Oslo University Hospital Ullevål, Oslo, Norway
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13
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Shagawa M, Maruyama S, Sekine C, Yokota H, Hirabayashi R, Hirata A, Yokoyama M, Edama M. Comparison of anterior knee laxity, stiffness, genu recurvatum, and general joint laxity in the late follicular phase and the ovulatory phase of the menstrual cycle. BMC Musculoskelet Disord 2021; 22:886. [PMID: 34663291 PMCID: PMC8524894 DOI: 10.1186/s12891-021-04767-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/06/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND One risk factor for anterior cruciate ligament (ACL) injury may be fluctuations in female hormones. This study examined variability in joint laxity, as a risk factor for ACL injury, during the menstrual cycle. METHODS Subjects were 15 female university students with regular menstrual cycles. We measured estradiol (E2) concentration, anterior knee laxity (AKL), stiffness, genu recurvatum (GR), and general joint laxity (GJL) during the late follicular and ovulatory phases. AKL was measured as anterior tibial displacement of the femur after application of 44-, 89-, and 133-N loads on the tibia. Stiffness was calculated as Δforce/Δdisplacement at loads of 44-89 N and between 89 and 133 N. GR was measured prone, with the base of the patella distal to the edge of the bed. The University of Tokyo joint laxity test was used to evaluate GJL. RESULTS E2 concentration was significantly higher in the ovulatory phase than in the late follicular phase (p = 0.018), AKL and stiffness did not differ significantly between phases, and GR and GJL were significantly higher in the ovulatory phase than in the late follicular phase (p = 0.011, 0.031). CONCLUSION These findings suggest that E2 concentrations may affect GR and GJL during the menstrual cycle.
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Affiliation(s)
- Mayuu Shagawa
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
| | - Sae Maruyama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Niigata, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - Chie Sekine
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Niigata, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - Hirotake Yokota
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Niigata, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - Ryo Hirabayashi
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Niigata, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - Arisa Hirata
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
| | - Mizuki Yokoyama
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan
| | - Mutsuaki Edama
- Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan.
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Niigata, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan.
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14
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Risk Factors for Contra-Lateral Secondary Anterior Cruciate Ligament Injury: A Systematic Review with Meta-Analysis. Sports Med 2021; 51:1419-1438. [PMID: 33515391 PMCID: PMC8222029 DOI: 10.1007/s40279-020-01424-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2020] [Indexed: 01/14/2023]
Abstract
Background The risk of sustaining a contra-lateral anterior cruciate ligament (C-ACL) injury after primary unilateral ACL injury is high. C-ACL injury often contributes to a further decline in function and quality of life, including failure to return to sport. There is, however, very limited knowledge about which risk factors that contribute to C-ACL injury. Objective To systematically review instrinsic risk factors for sustaining a C-ACL injury. Methods A systematic review with meta-analysis was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Four databases (MEDLINE, CINAHL, EMBASE, Sport Discus) were searched from inception to January 2020. Inclusion criteria were prospective or retrospective studies investigating any intrinsic risk factor for future C-ACL injury. Meta-analysis was performed and expressed as odds ratios (OR) if two or more articles assessed the same risk factor. Results 44 moderate-to-high quality studies were eventually included in this review, whereof 35 studies were eligible for meta-analysis, including up to 59 000 individuals. We identified seven factors independently increasing the odds of sustaining a C-ACL injury (in order of highest to lowest OR): (1) returning to a high activity level (OR 3.26, 95% CI 2.10–5.06); (2) Body Mass Index < 25 (OR 2.73, 95% CI 1.73–4.36); (3) age ≤ 18 years (OR 2.42, 95% CI 1.51–3.88); (4) family history of ACL injury (OR 2.07, 95% CI 1.54–2.80); (5) primary ACL reconstruction performed ≤ 3 months post injury (OR 1.65, 95% CI: 1.32–2.06); (6) female sex (OR 1.35, 95% CI 1.14–1.61); and (7) concomitant meniscal injury (OR 1.21, 95% CI 1.03–1.42). The following two factors were associated with decreased odds of a subsequent C-ACL injury: 1) decreased intercondylar notch width/width of the distal femur ratio (OR 0.43, 95% CI 0.25–0.69) and 2) concomitant cartilage injury (OR 0.83, 95% CI 0.69–1.00). There were no associations between the odds of sustaining a C-ACL injury and smoking status, pre-injury activity level, playing soccer compared to other sports or timing of return to sport. No studies of neuromuscular function in relation to risk of C-ACL injury were eligible for meta-analysis according to our criteria. Conclusion This review provides evidence that demographic factors such as female sex, young age (≤ 18 years) and family history of ACL injury, as well as early reconstruction and returning to a high activity level increase the risk of C-ACL injury. Given the lack of studies related to neuromuscular factors that may be modifiable by training, future studies are warranted that investigate the possible role of factors such as dynamic knee stability and alignment, muscle activation and/or strength and proprioception as well as sport-specific training prior to return-to-sport for C-ACL injuries. PROSPERO: CRD42020140129. Supplementary Information The online version contains supplementary material available at 10.1007/s40279-020-01424-3.
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