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Lynn Snydermackler - One of the best experts on this subject based on the ideXlab platform.
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limb symmetry indexes can overestimate Knee Function after anterior cruciate ligament injury
Journal of Orthopaedic & Sports Physical Therapy, 2017Co-Authors: Elizabeth Wellsandt, Mathew Failla, Lynn SnydermacklerAbstract:Study Design Prospective cohort. Background The high risk of second anterior cruciate ligament (ACL) injuries after return to sport highlights the importance of return-to-sport decision making. Objective return-to-sport criteria frequently use limb symmetry indexes (LSIs) to quantify quadriceps strength and hop scores. Whether using the uninvolved limb in LSIs is optimal is unknown. Objectives To evaluate the uninvolved limb as a reference standard for LSIs utilized in return-to-sport testing and its relationship with second ACL injury rates. Methods Seventy athletes completed quadriceps strength and 4 single-leg hop tests before anterior cruciate ligament reconstruction (ACLR) and 6 months after ACLR. Limb symmetry indexes for each test compared involved-limb measures at 6 months to uninvolved-limb measures at 6 months. Estimated preinjury capacity (EPIC) levels for each test compared involved-limb measures at 6 months to uninvolved-limb measures before ACLR. Second ACL injuries were tracked for a minimu...
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limb symmetry indexes can overestimate Knee Function after anterior cruciate ligament injury
Journal of Orthopaedic & Sports Physical Therapy, 2017Co-Authors: Elizabeth Wellsandt, Mathew Failla, Lynn SnydermacklerAbstract:Study Design Prospective cohort. Background The high risk of second anterior cruciate ligament (ACL) injuries after return to sport highlights the importance of return-to-sport decision making. Objective return-to-sport criteria frequently use limb symmetry indexes (LSIs) to quantify quadriceps strength and hop scores. Whether using the uninvolved limb in LSIs is optimal is unknown. Objectives To evaluate the uninvolved limb as a reference standard for LSIs utilized in return-to-sport testing and its relationship with second ACL injury rates. Methods Seventy athletes completed quadriceps strength and 4 single-leg hop tests before anterior cruciate ligament reconstruction (ACLR) and 6 months after ACLR. Limb symmetry indexes for each test compared involved-limb measures at 6 months to uninvolved-limb measures at 6 months. Estimated preinjury capacity (EPIC) levels for each test compared involved-limb measures at 6 months to uninvolved-limb measures before ACLR. Second ACL injuries were tracked for a minimum follow-up of 2 years after ACLR. Results Forty (57.1%) patients achieved 90% LSIs for quadriceps strength and all hop tests. Only 20 (28.6%) patients met 90% EPIC levels (comparing the involved limb at 6 months after ACLR to the uninvolved limb before ACLR) for quadriceps strength and all hop tests. Twenty-four (34.3%) patients who achieved 90% LSIs for all measures 6 months after ACLR did not achieve 90% EPIC levels for all measures. Estimated preinjury capacity levels were more sensitive than LSIs in predicting second ACL injuries (LSIs, 0.273; 95% confidence interval [CI]: 0.010, 0.566 and EPIC, 0.818; 95% CI: 0.523, 0.949). Conclusion Limb symmetry indexes frequently overestimate Knee Function after ACLR and may be related to second ACL injury risk. These findings raise concern about whether the variable ACL return-to-sport criteria utilized in current clinical practice are stringent enough to achieve safe and successful return to sport. Level of Evidence Prognosis, 2b. J Orthop Sports Phys Ther 2017;47(5):334-338. Epub 29 Mar 2017. doi:10.2519/jospt.2017.7285.
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self reported Knee Function can identify athletes who fail return to activity criteria up to 1 year after anterior cruciate ligament reconstruction a delaware oslo acl cohort study
Journal of Orthopaedic & Sports Physical Therapy, 2014Co-Authors: David Logerstedt, Lars Engebretsen, Ingrid Eitzen, May Arna Risberg, Hege Grindem, Andrew D Lynch, Michael J Axe, Di Stasi S, Lynn SnydermacklerAbstract:Study Design Cohort study, cross-sectional. Objectives To determine if self-reported Knee Function assessed with the International Knee Documentation Committee 2000 Subjective Knee Form (IKDC 2000) could discriminate between successful and nonsuccessful performance on return-to-activity criteria (RTAC) tests after anterior cruciate ligament (ACL) reconstruction. Background Selecting appropriate performance-based and patient-reported tests that can detect side-to-side asymmetries, assess global Knee Function, and determine a participant's readiness to return to activity after ACL reconstruction can be a challenge for rehabilitation specialists. A simple tool or questionnaire to identify athletes with neuromuscular impairments or activity limitations could provide rehabilitation specialists with crucial data pertinent to their patients' current Knee Function and readiness to return to higher-level activities. Methods One hundred ninety-four level I and level II athletes who underwent ACL reconstruction part...
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nonsurgical or surgical treatment of acl injuries Knee Function sports participation and Knee reinjury the delaware oslo acl cohort study
Journal of Bone and Joint Surgery American Volume, 2014Co-Authors: Hege Grindem, Lars Engebretsen, Ingrid Eitzen, Lynn Snydermackler, May Arna RisbergAbstract:Background: While there are many opinions about the expected Knee Function, sports participation, and risk of Knee reinjury following nonsurgical treatment of injuries of the anterior cruciate ligament (ACL), there is a lack of knowledge about the clinical course following nonsurgical treatment compared with that after surgical treatment. Methods: This prospective cohort study included 143 patients with an ACL injury. Isokinetic Knee extension and flexion strength and patient-reported Knee Function as recorded on the International Knee Documentation Committee (IKDC) 2000 form were collected at baseline, six weeks, and two years. Sports participation was reported monthly for two years with use of an online activity survey. Knee reinjuries were reported at the follow-up evaluations and in a monthly online survey. Repeated analysis of variance (ANOVA), generalized estimating equation (GEE) models, and Cox regression analysis were used to analyze group differences in Functional outcomes, sports participation, and Knee reinjuries, respectively. Results: The surgically treated patients (n = 100) were significantly younger, more likely to participate in level-I sports, and less likely to participate in level-II sports prior to injury than the nonsurgically treated patients (n = 43). There were no significant group-by-time effects on Functional outcome. The crude analysis showed that surgically treated patients were more likely to sustain a Knee reinjury and to participate in level-I sports in the second year of the follow-up period. After propensity score adjustment, these differences were nonsignificant; however, the nonsurgically treated patients were significantly more likely to participate in level-II sports during the first year of the follow-up period and in level-III sports over the two years. After two years, 30% of all patients had an extensor strength deficit, 31% had a flexor strength deficit, 20% had patient-reported Knee Function below the normal range, and 20% had experienced Knee reinjury. Conclusions: There were few differences between the clinical courses following nonsurgical and surgical treatment of ACL injury in this prospective cohort study. Regardless of treatment course, a considerable number of patients did not fully recover following the ACL injury, and future work should focus on improving the outcomes for these patients. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
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kinesiophobia after anterior cruciate ligament rupture and reconstruction noncopers versus potential copers
Journal of Orthopaedic & Sports Physical Therapy, 2013Co-Authors: Erin H Hartigan, David Logerstedt, Andrew D Lynch, Terese L Chmielewski, Lynn SnydermacklerAbstract:Study Design Secondary-analysis, longitudinal cohort study. Objectives To compare kinesiophobia levels in noncopers and potential copers at time points spanning pre- and post-anterior cruciate ligament (ACL) reconstruction and to examine the association between changes in kinesiophobia levels and clinical measures. Background After ACL injury, a screening examination may be used to classify patients as potential copers or noncopers based on dynamic Knee stability. Quadriceps strength, single-leg hop performance, and self-reported Knee Function are worse in noncopers. High kinesiophobia levels after ACL reconstruction are associated with poorer self-reported Knee Function and lower return-to-sport rates. Kinesiophobia levels have not been examined before ACL reconstruction, across the transition from presurgery to postsurgery, or based on potential coper and noncoper classification. Methods Quadriceps strength indexes, single-leg hop score indexes, self-reported Knee Function (Knee Outcome Survey activitie...
May Arna Risberg - One of the best experts on this subject based on the ideXlab platform.
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self reported Knee Function can identify athletes who fail return to activity criteria up to 1 year after anterior cruciate ligament reconstruction a delaware oslo acl cohort study
Journal of Orthopaedic & Sports Physical Therapy, 2014Co-Authors: David Logerstedt, Lars Engebretsen, Ingrid Eitzen, May Arna Risberg, Hege Grindem, Andrew D Lynch, Michael J Axe, Di Stasi S, Lynn SnydermacklerAbstract:Study Design Cohort study, cross-sectional. Objectives To determine if self-reported Knee Function assessed with the International Knee Documentation Committee 2000 Subjective Knee Form (IKDC 2000) could discriminate between successful and nonsuccessful performance on return-to-activity criteria (RTAC) tests after anterior cruciate ligament (ACL) reconstruction. Background Selecting appropriate performance-based and patient-reported tests that can detect side-to-side asymmetries, assess global Knee Function, and determine a participant's readiness to return to activity after ACL reconstruction can be a challenge for rehabilitation specialists. A simple tool or questionnaire to identify athletes with neuromuscular impairments or activity limitations could provide rehabilitation specialists with crucial data pertinent to their patients' current Knee Function and readiness to return to higher-level activities. Methods One hundred ninety-four level I and level II athletes who underwent ACL reconstruction part...
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nonsurgical or surgical treatment of acl injuries Knee Function sports participation and Knee reinjury the delaware oslo acl cohort study
Journal of Bone and Joint Surgery American Volume, 2014Co-Authors: Hege Grindem, Lars Engebretsen, Ingrid Eitzen, Lynn Snydermackler, May Arna RisbergAbstract:Background: While there are many opinions about the expected Knee Function, sports participation, and risk of Knee reinjury following nonsurgical treatment of injuries of the anterior cruciate ligament (ACL), there is a lack of knowledge about the clinical course following nonsurgical treatment compared with that after surgical treatment. Methods: This prospective cohort study included 143 patients with an ACL injury. Isokinetic Knee extension and flexion strength and patient-reported Knee Function as recorded on the International Knee Documentation Committee (IKDC) 2000 form were collected at baseline, six weeks, and two years. Sports participation was reported monthly for two years with use of an online activity survey. Knee reinjuries were reported at the follow-up evaluations and in a monthly online survey. Repeated analysis of variance (ANOVA), generalized estimating equation (GEE) models, and Cox regression analysis were used to analyze group differences in Functional outcomes, sports participation, and Knee reinjuries, respectively. Results: The surgically treated patients (n = 100) were significantly younger, more likely to participate in level-I sports, and less likely to participate in level-II sports prior to injury than the nonsurgically treated patients (n = 43). There were no significant group-by-time effects on Functional outcome. The crude analysis showed that surgically treated patients were more likely to sustain a Knee reinjury and to participate in level-I sports in the second year of the follow-up period. After propensity score adjustment, these differences were nonsignificant; however, the nonsurgically treated patients were significantly more likely to participate in level-II sports during the first year of the follow-up period and in level-III sports over the two years. After two years, 30% of all patients had an extensor strength deficit, 31% had a flexor strength deficit, 20% had patient-reported Knee Function below the normal range, and 20% had experienced Knee reinjury. Conclusions: There were few differences between the clinical courses following nonsurgical and surgical treatment of ACL injury in this prospective cohort study. Regardless of treatment course, a considerable number of patients did not fully recover following the ACL injury, and future work should focus on improving the outcomes for these patients. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
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single legged hop tests as predictors of self reported Knee Function after anterior cruciate ligament reconstruction the delaware oslo acl cohort study
American Journal of Sports Medicine, 2012Co-Authors: David Logerstedt, Lars Engebretsen, Ingrid Eitzen, May Arna Risberg, Hege Grindem, Andrew D Lynch, Michael J Axe, Lynn SnydermacklerAbstract:Background:Single-legged hop tests are commonly used Functional performance measures that can capture limb asymmetries in patients after anterior cruciate ligament (ACL) reconstruction. Hop tests hold potential as predictive factors of self-reported Knee Function in individuals after ACL reconstruction.Hypothesis:Single-legged hop tests conducted preoperatively would not and 6 months after ACL reconstruction would predict self-reported Knee Function (International Knee Documentation Committee [IKDC] 2000) 1 year after ACL reconstruction.Study Design:Cohort study (prognosis); Level of evidence, 2.Methods:One hundred twenty patients who were treated with ACL reconstruction performed 4 single-legged hop tests preoperatively and 6 months after ACL reconstruction. Self-reported Knee Function within normal ranges was defined as IKDC 2000 scores greater than or equal to the age- and sex-specific normative 15th percentile score 1 year after surgery. Logistic regression analyses were performed to identify predicto...
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single legged hop tests as predictors of self reported Knee Function in nonoperatively treated individuals with anterior cruciate ligament injury
American Journal of Sports Medicine, 2011Co-Authors: Hege Grindem, Lars Engebretsen, Ingrid Eitzen, David Logerstedt, Lynn Snydermackler, Havard Moksnes, May Arna RisbergAbstract:Background: Previous studies have found significant predictors for Functional outcome after anterior cruciate ligament (ACL) reconstruction; however, studies examining predictors for Functional outcome in nonoperatively treated individuals are lacking.Hypothesis: Single-legged hop tests predict self-reported Knee Function (International Knee Documentation Committee [IKDC] 2000) in nonoperatively treated ACL-injured individuals 1 year after baseline testing.Study Design: Cohort study (prognosis); Level of evidence, 2.Methods: Ninety-one nonoperatively treated patients with an ACL injury were tested using 4 single-legged hop tests on average 74 ± 30 days after injury in a prospective cohort study. Eighty-one patients (89%) completed the IKDC 2000 1 year later. Patients with an IKDC 2000 score equal to or higher than the age- and gender-specific 15th percentile score from previously published data on an uninjured population were classified as having self-reported Function within normal ranges. Logistic regre...
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Knee Function and prevalence of Knee osteoarthritis after anterior cruciate ligament reconstruction a prospective study with 10 to 15 years of follow up
American Journal of Sports Medicine, 2010Co-Authors: Britt Elin Oiestad, Lars Engebretsen, Inger Holm, Arne Kristian Aune, Ragnhild Gunderson, Grethe Myklebust, Merete Aarsland Fosdahl, May Arna RisbergAbstract:BackgroundFew prospective long-term studies of more than 10 years have reported changes in Knee Function and radiologic outcomes after anterior cruciate ligament (ACL) reconstruction.PurposeTo examine changes in Knee Function from 6 months to 10 to 15 years after ACL reconstruction and to compare Knee Function outcomes over time for subjects with isolated ACL injury with those with combined ACL and meniscal injury and/or chondral lesion. Furthermore, the aim was to compare the prevalence of radiographic and symptomatic radiographic Knee osteoarthritis between subjects with isolated ACL injuries and those with combined ACL and meniscal and/or chondral lesions 10 to 15 years after ACL reconstruction.Study DesignCohort study; Level of evidence, 2.MethodsFollow-up evaluations were performed on 221 subjects at 6 months, 1 year, 2 years, and 10 to 15 years after ACL reconstruction with bone-patellar tendon-bone autograft. Outcome measurements were KT-1000 arthrometer, Lachman and pivot shift tests, Cincinnati k...
Kenneth B Mathis - One of the best experts on this subject based on the ideXlab platform.
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does total Knee replacement restore normal Knee Function
Clinical Orthopaedics and Related Research, 2005Co-Authors: Philip C Noble, Michael J Gordon, Jennifer Weiss, Robert N Reddix, Michael A Conditt, Kenneth B MathisAbstract:Despite the advanced age of many patients having total Knee arthroplasty, previous attempts to quantify patient Function postoperatively have not allowed for normal deterioration of musculoskeletal Function that occurs with aging. We determined the effects of aging on Knee Function, thereby providing a realistic level of normal, healthy Knee Function for patients and surgeons after total Knee arthroplasties. A self-administered, validated Knee Function questionnaire consisting of 55 scaled multiple choice questions was used in this study. Responses were collected from 243 patients at least 1 year after they had total Knee arthroplasties, and from 257 individuals (age- and gender-matched) who had no previous history of Knee disorders. Many of these latter subjects reported that they could do most of the activities cited in the questionnaire without symptoms attributable to their Knees. However, Knee symptoms were experienced more frequently during activities that placed greater loads on the extremity. There was no difference in the Knee Function of men and women, and both groups had continuous deterioration in Knee Function with increasing age. There were large differences in the Functional capacity to do activities involving the Knee between the group of patients who had total Knee arthroplasties and the age- and gender-matched patients with no previous Knee disorders. Overall, 52% of the patients who had total Knee arthroplasties reported some degree of limitation in doing Functional activities, versus 22% of subjects with no previous Knee disorders. Two groups of activities were identified: activities in which the patients and control subjects had essentially similar Knee Function (swimming, golfing, and stationary biking), and activities in which the Function scores of the control group exceeded the scores of the patients who had total Knee arthroplasties (Kneeling, squatting, moving laterally, turning and cutting, carrying loads, stretching, leg strengthening, tennis, dancing, gardening, and sexual activity). Our data show that many of the limitations reported by patients after total Knee arthroplasties are shared by individuals with no previous Knee disorders. However, only approximately 40% of the Functional deficit present after a total Knee arthroplasty seems to be attributable to the normal physiologic effects of aging. Patients who had total Knee replacements still experienced substantial Functional impairment compared with their age- and gender-matched peers, especially when doing biomechanically demanding activities. This suggests that significant improvements in the procedure and prosthetic designs are needed to restore normal Knee Function after a total Knee arthroplasty.
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does total Knee replacement restore normal Knee Function
Clinical Orthopaedics and Related Research, 2005Co-Authors: Philip C Noble, Michael J Gordon, Robert N Reddix, Michael A Conditt, Jennifer M Weiss, Kenneth B MathisAbstract:Despite the advanced age of many patients having total Knee arthroplasty, previous attempts to quantify patient Function postoperatively have not allowed for normal deterioration of musculoskeletal Function that occurs with aging. We determined the effects of aging on Knee Function, thereby providin
Konstantinos N Malizos - One of the best experts on this subject based on the ideXlab platform.
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better Knee Function after surgical repair of acute quadriceps tendon rupture in comparison to acute patellar tendon rupture
Orthopaedics & Traumatology-surgery & Research, 2019Co-Authors: Michael E Hantes, Rejith Mathews, Vasilios Raoulis, Sokratis E Varitimidis, Theophilos Karachalios, Konstantinos N MalizosAbstract:Abstract Introduction The purpose of this study was to determine if there is a difference in Knee Function between patients with quadriceps tendon rupture and patellar tendon rupture after acute surgical repair. Our hypothesis was that Knee Function would be similar between the two groups. Methods The study population included 24 patients; 13 patients suffered from quadriceps tendon rupture and 11 patients from patellar tendon rupture. All patients underwent acute surgical repair using heavy non-absorbable trans-osseous sutures; another non-absorbable suture, passed through both retinaculum and around the repaired tendon to augment the repair. Clinical evaluation was performed using the Lysholm, Kujala, and VAS scoring systems. In addition, radiographic evaluation to evaluate patellar height and patello-femoral joint arthritis using Iwano's classification was performed. Results The average follow-up time was 70.5 months. All patients in the quadriceps tendon group had full range of Knee motion while 3 patients (27%) in the patellar tendon group had reduced Knee flexion. Patients in the quadriceps tendon group had a significantly higher Kujala score in comparison to the patellar tendon group (88 vs. 73 p = 0.033). No significant differences were identified between the two groups according to the Lysholm scoring system. Patients in the quadriceps tendon group had significantly less pain according to VAS scale (1.2 vs. 3.5 p = 0.012). Radiographic evaluation revealed that two patients from each group showed signs of grade II patello-femoral joint arthritis according to Iwano's classification. Conclusion Acute surgical repair of quadriceps tendon ruptures provides better Knee Function, in comparison to the surgical restoration of patellar tendon rupture. Level of evidence Level III, retrospective comparative study.
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satisfactory Functional and radiological outcomes can be expected in young patients under 45 years old after open wedge high tibial osteotomy in a long term follow up
Knee Surgery Sports Traumatology Arthroscopy, 2018Co-Authors: Michael E Hantes, Prodromos Natsaridis, Antonios Koutalos, Yohei Ono, Nikolaos Doxariotis, Konstantinos N MalizosAbstract:Purpose To report the long-term outcomes of medial open wedge high tibial osteotomy (MOWHTO) for the treatment of medial compartment Knee osteoarthritis in patients younger than 45 years old. It was hypothesized that the correction of Knee alignment would result in preservation of Knee Function in a long-term follow-up.
Lars Engebretsen - One of the best experts on this subject based on the ideXlab platform.
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high prevalence of Knee osteoarthritis at a minimum 10 year follow up after Knee dislocation surgery
Knee Surgery Sports Traumatology Arthroscopy, 2017Co-Authors: Gilbert Moatshe, Grant J Dornan, Tom C Ludvigsen, Sverre Loken, Robert F Laprade, Lars EngebretsenAbstract:Purpose Long-term outcomes and the prevalence of osteoarthritis after surgical treatment of Knee dislocations are lacking in the literature. The purpose of this study was to investigate the prevalence of Knee osteoarthritis and Knee Function at a minimum of 10 years after Knee dislocation surgery.
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self reported Knee Function can identify athletes who fail return to activity criteria up to 1 year after anterior cruciate ligament reconstruction a delaware oslo acl cohort study
Journal of Orthopaedic & Sports Physical Therapy, 2014Co-Authors: David Logerstedt, Lars Engebretsen, Ingrid Eitzen, May Arna Risberg, Hege Grindem, Andrew D Lynch, Michael J Axe, Di Stasi S, Lynn SnydermacklerAbstract:Study Design Cohort study, cross-sectional. Objectives To determine if self-reported Knee Function assessed with the International Knee Documentation Committee 2000 Subjective Knee Form (IKDC 2000) could discriminate between successful and nonsuccessful performance on return-to-activity criteria (RTAC) tests after anterior cruciate ligament (ACL) reconstruction. Background Selecting appropriate performance-based and patient-reported tests that can detect side-to-side asymmetries, assess global Knee Function, and determine a participant's readiness to return to activity after ACL reconstruction can be a challenge for rehabilitation specialists. A simple tool or questionnaire to identify athletes with neuromuscular impairments or activity limitations could provide rehabilitation specialists with crucial data pertinent to their patients' current Knee Function and readiness to return to higher-level activities. Methods One hundred ninety-four level I and level II athletes who underwent ACL reconstruction part...
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nonsurgical or surgical treatment of acl injuries Knee Function sports participation and Knee reinjury the delaware oslo acl cohort study
Journal of Bone and Joint Surgery American Volume, 2014Co-Authors: Hege Grindem, Lars Engebretsen, Ingrid Eitzen, Lynn Snydermackler, May Arna RisbergAbstract:Background: While there are many opinions about the expected Knee Function, sports participation, and risk of Knee reinjury following nonsurgical treatment of injuries of the anterior cruciate ligament (ACL), there is a lack of knowledge about the clinical course following nonsurgical treatment compared with that after surgical treatment. Methods: This prospective cohort study included 143 patients with an ACL injury. Isokinetic Knee extension and flexion strength and patient-reported Knee Function as recorded on the International Knee Documentation Committee (IKDC) 2000 form were collected at baseline, six weeks, and two years. Sports participation was reported monthly for two years with use of an online activity survey. Knee reinjuries were reported at the follow-up evaluations and in a monthly online survey. Repeated analysis of variance (ANOVA), generalized estimating equation (GEE) models, and Cox regression analysis were used to analyze group differences in Functional outcomes, sports participation, and Knee reinjuries, respectively. Results: The surgically treated patients (n = 100) were significantly younger, more likely to participate in level-I sports, and less likely to participate in level-II sports prior to injury than the nonsurgically treated patients (n = 43). There were no significant group-by-time effects on Functional outcome. The crude analysis showed that surgically treated patients were more likely to sustain a Knee reinjury and to participate in level-I sports in the second year of the follow-up period. After propensity score adjustment, these differences were nonsignificant; however, the nonsurgically treated patients were significantly more likely to participate in level-II sports during the first year of the follow-up period and in level-III sports over the two years. After two years, 30% of all patients had an extensor strength deficit, 31% had a flexor strength deficit, 20% had patient-reported Knee Function below the normal range, and 20% had experienced Knee reinjury. Conclusions: There were few differences between the clinical courses following nonsurgical and surgical treatment of ACL injury in this prospective cohort study. Regardless of treatment course, a considerable number of patients did not fully recover following the ACL injury, and future work should focus on improving the outcomes for these patients. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
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an isolated rupture of the posterior cruciate ligament results in reduced preoperative Knee Function in comparison with an anterior cruciate ligament injury
Knee Surgery Sports Traumatology Arthroscopy, 2013Co-Authors: Asbjorn Aroen, Lars Engebretsen, Einar Andreas Sivertsen, Christian Owesen, Larspetter GrananAbstract:To investigate differences in preoperative Knee Function (Knee Injury and Osteoarthritis Outcome Score, KOOS), the time period from injury to surgery, and associated injuries when comparing primary isolated posterior cruciate ligament (PCL) and primary anterior cruciate ligament (ACL) reconstructions. Isolated primary ACL and PCL reconstructions registered in the Norwegian National Knee Ligament Registry from 2004 through 2010 were included (n = 71 primary PCLs and 9,649 primary ACLs). Linear regression analysis was used to evaluate the preoperative KOOS subscale values. The preoperative KOOS in the PCL group (n = 71) and ACL group (n = 9,649) was significantly different for the subscales symptoms (mean difference, −8.4; 95 % CI: −12.8 to −4.0), pain (mean difference, −15.9; 95 % CI: −20.3 to −11.4), activities of daily living (mean difference, −12.9; 95 % CI: −17.4 to −8.4), sport and recreation (mean difference, −15.9; 95 % CI: −22.6 to −9.3), and quality of life (mean difference, −7.9; 95 % CI: −12.4 to −3.5). The primary isolated PCL-reconstructed Knees had a median time from injury to surgery of 21 months in comparison with 8 months for ACL injuries. The ACL-injured Knees had more associated injuries (meniscus and full-thickness cartilage lesions) than the PCL-injured Knees. Surgically treated Knees with an isolated rupture of the PCL exhibited worse Knee Function preoperatively compared with Knees with an isolated ACL injury; in addition, the delay to surgery was longer. Meniscal lesions were found more frequently in ACL-injured Knees. Prospective cohort study, evidence Level I.
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single legged hop tests as predictors of self reported Knee Function after anterior cruciate ligament reconstruction the delaware oslo acl cohort study
American Journal of Sports Medicine, 2012Co-Authors: David Logerstedt, Lars Engebretsen, Ingrid Eitzen, May Arna Risberg, Hege Grindem, Andrew D Lynch, Michael J Axe, Lynn SnydermacklerAbstract:Background:Single-legged hop tests are commonly used Functional performance measures that can capture limb asymmetries in patients after anterior cruciate ligament (ACL) reconstruction. Hop tests hold potential as predictive factors of self-reported Knee Function in individuals after ACL reconstruction.Hypothesis:Single-legged hop tests conducted preoperatively would not and 6 months after ACL reconstruction would predict self-reported Knee Function (International Knee Documentation Committee [IKDC] 2000) 1 year after ACL reconstruction.Study Design:Cohort study (prognosis); Level of evidence, 2.Methods:One hundred twenty patients who were treated with ACL reconstruction performed 4 single-legged hop tests preoperatively and 6 months after ACL reconstruction. Self-reported Knee Function within normal ranges was defined as IKDC 2000 scores greater than or equal to the age- and sex-specific normative 15th percentile score 1 year after surgery. Logistic regression analyses were performed to identify predicto...