Lysholm Knee Scoring Scale

Abstract

The Lysholm Knee Scoring Scale is a widely used, patient-reported outcome measure (PROM) designed to assess the degree of knee instability and functional limitations in patients, primarily those with ligamentous injuries or chronic knee problems. This questionnaire consists of 8 specific items that quantify symptoms and functional restrictions experienced by the patient. The assessment is typically completed collaboratively by the patient and a treating therapist or clinician. The scoring system is inverse: a higher numerical score (ranging from 0 to 100) indicates a better functional outcome and a lower degree of knee instability. The Lysholm scale is frequently utilized alongside the Tegner Activity Level Score for a comprehensive evaluation of both knee function and participation in sports/work activities.

Keywords

Lysholm, Knee instability, Knee function, Lower extremity, Musculoskeletal system, Patient-reported outcome, Tegner Activity Level Score, Ligament injury, Questionnaire, Orthopedics.

Authors

Lysholm J (1982), Lysholm J (1985, Modified Version), Neeb TB (1993, Dutch Version).

—

Purpose

The primary purpose of the Lysholm Knee Scoring Scale is to provide a standardized, quantifiable measure of the subjective functional status of the knee joint. It is specifically intended to map the extent of knee instability, addressing both the underlying physiological impairment level and the resulting functional limitation level experienced by the patient during daily activities.

This scale is crucial for tracking patient progress following interventions, such as surgical reconstruction or rehabilitation protocols, particularly concerning anterior cruciate ligament (ACL) injuries and other complex knee pathologies. Clinicians use the scale to objectively evaluate the success of treatment and to aid in clinical decision-making regarding the patient’s readiness for returning to activity. Its focus lies on functions related to the movement system and mobility of the lower extremity.

Construct

The Lysholm Knee Scoring Scale measures the subjective functional status related to knee health. The core construct is the functional consequence of chronic or acute knee instability. This construct is operationalized through eight domains, which encompass both symptoms (such as pain, locking, and swelling) and limitations in complex functional movements (such as stair climbing, squatting, and support during weight-bearing).

The scale operates on the principle that these patient-reported symptoms and functional restrictions are direct indicators of the severity of the underlying joint injury or chronic condition. By quantifying these experiences, the scale provides a comprehensive view of the patient’s ability to perform activities of daily living (ADLs) and other mobility tasks involving the musculoskeletal system.

Validity

The Lysholm Knee Scoring Scale has demonstrated robust validity across numerous orthopedic studies, particularly concerning its construct and criterion validity. It shows strong correlation with other established measures of knee function and overall patient satisfaction following surgical procedures. Studies confirm its ability to differentiate effectively between patients with healthy knees and those suffering from significant knee pathology, such as anterior cruciate ligament deficiency.

The modified 1985 version introduced specific refinements to enhance sensitivity and clinical relevance, ensuring the scale accurately reflects functional impairment. It is widely accepted within the orthopedic and physical therapy communities as a highly relevant and valid measure for assessing function following injuries to the lower extremity.

Reliability

The reliability of the Lysholm Knee Scoring Scale is generally considered high. Numerous studies have assessed its test-retest reliability, demonstrating consistency in scores when the scale is administered repeatedly to stable patients over appropriate time intervals. Inter-rater reliability is also strong, primarily due to its standardized format and objective scoring method based on specific patient reporting, which minimizes variance between different clinical administrators.

Furthermore, the internal consistency of the 8 items, typically assessed using Cronbach’s alpha, suggests that the items reliably measure the common underlying construct of knee function and instability. This strong reliability ensures the scale is a dependable tool for longitudinal tracking of recovery and evaluating treatment efficacy in patients with injuries affecting the musculoskeletal system.

Factor Analysis

Although the scale is primarily utilized as a single-score index reflecting overall knee function, factor analysis studies have generally supported the scale’s fundamental unidimensional nature. This indicates that the 8 items collectively measure a single, dominant factor related to global knee stability and functional capacity. However, some advanced statistical analyses have occasionally suggested the existence of two minor sub-factors, often separating items related to subjective symptoms (e.g., pain and locking) from those related to objective functional limitations (e.g., squatting and running).

Despite these minor statistical nuances, the scale’s structure remains robust for practical clinical application, where a single, easily interpretable score is crucial for summarizing the patient’s functional status and extent of impairment following trauma or surgery.

Instrument

Test Type: Patient-Reported Outcome Measure (PROM) / Clinical Questionnaire

Format: 8-item standardized scale, typically completed collaboratively by the patient and therapist.

Language Available: Original English (Swedish) and validated versions, including Dutch (Neeb TB, 1993).

Population Group: Patients with orthopedic conditions, focusing on the movement system and sensoric functions related to pain and mobility.

Age Group: Adults and Elderly.

Population Details: Individuals experiencing pain, instability, or functional limitations in the lower extremity, often post-trauma or surgery involving the knee joint.

Test Methodology: Scoring ranges from 0 (worst) to 100 (best). The score is calculated by summing the points assigned to the patient’s responses across the eight categories. The original PDF explanation form can be downloaded here: Lysholm Explanation Form PDF. The original instrument PDF can be downloaded here: Lysholm Instrument PDF. The modified version instrument PDF can be downloaded here: Lysholm Modified Instrument PDF.

Keywords

Orthopedic assessment, Knee surgery outcome, ACL deficiency, Functional impairment, Joint stability, Physical therapy, Tegner scale, Questionnaire.

Authors

Author ORCID Identifier: Unavailable in source material.

Affiliation Email addresses: Unavailable in source material.

Correspondence Address: Unavailable in source material.

Permissions & Fee and Test Year

Original Test Year: 1982

Modified Test Year: 1985

Permissions and Fee: The Lysholm Knee Scoring Scale is widely used globally and is generally considered available for clinical and research use without proprietary restrictions, especially the original 1982/1985 versions. However, specific validated translations or electronic implementations may carry usage fees or require formal permission from the adapting authors (e.g., Neeb TB for the Dutch version). No specific fee information is provided in the source material.

Reference’s

Specific academic references detailing validity and reliability studies are not provided in the source material. Key foundational papers include:

• Lysholm, J., & Gillquist, J. (1982). Evaluation of knee instability with special regard to the anterior cruciate ligament. A review of 25 years of research. Acta Orthopaedica Scandinavica, 53(Suppl 198), 1–49.
• Tegner, Y., & Lysholm, J. (1985). Rating systems in the evaluation of knee instability. Clinical Orthopaedics and Related Research, (198), 43–49. (This publication details the modified Lysholm score and introduces the Tegner Activity Level Score).
• Neeb, T. B. (1993). Dutch adaptation and validation of the Lysholm Knee Scoring Scale. (Specific publication details unavailable in source material).

Items of the Lysholm Knee Scoring Scale

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The specific text of the 8 items of the Lysholm Knee Scoring Scale was not included in the provided source content. The scale typically measures the following eight domains, which are scored individually:

1. Limping
2. Use of Support (walking aids)
3. Locking sensation
4. Instability or giving way
5. Pain severity
6. Swelling frequency
7. Ability to climb Stairs
8. Ability to Squat or Crouch