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Knee Injury and Osteoarthritis Outcome Score (KOOS)

Roos EM

ProQolid

Basic description

Developed in 1994-1995

Authors

Roos EM

Copyright
Without copyright
Objective
To assess Knee Injury and Osteoarthritis
Therapeutic area
  • Musculoskeletal Diseases
  • Wounds and Injuries
Therapeutic indication
  • Osteoarthritis
  • Knee Injuries
Type of Clinical Outcome Assessment (COA)
  • pro PRO
Original language(s)
  • English for the USA
  • Swedish for Sweden
Translations
43 translation(s)
Bibliographic reference(s) of the original questionnaire

Roos EM, Roos HP, Ryd L, Lohmander LS. Substantial disability 3 months after arthroscopic partial meniscectomy: A prospective study of patient-relevant outcomes. Arthroscopy 2000; 16:619-26 (PubMed Abstract)

Roos EM, Roos HP, Lohmander LS. WOMAC Osteoarthritis Index--additional dimensions for use in subjects with post-traumatic osteoarthritis of the knee. Western Ontario and MacMaster Universities. Osteoarthritis Cartilage 1999; 7(2):216-2 (PubMed Abstract)

Roos EM, Roos HP, Ekdahl C, Lohmander LS. Knee injury and Osteoarthritis Outcome Score (KOOS)--validation of a Swedish version. Scand J Med Sci Sports 1998;8:439-48 (PubMed Abstract)

Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther 1998; 28:88-96 (PubMed Abstract)


Contact and conditions of use

Authors

Roos EM

Institute of Sports Science and Clinical Biomechanics
University of Southern Denmark
Campusvej 55
DK-5230 Odense
Denmark
Email: eroos@health.sdu.dk

Ewa Roos Publications (PubMed)

Contact information

Conditions of use

 free access
 with author’s written permission
 with fees for academic/non profit research
 with fees for commercial/pharmaceutical companies
 with the signature of a contract/agreement
 other

Review copy

Available on www.koos.nu

Languages

Original language(s)

  • English for the USA
  • Swedish for Sweden

Translations

The list of available translations is subject to constant changes and may not be exhaustive. It is provided for information only. Some recently produced translations may not be included in the list below yet. Please do check the status of available translations with Mapi Research Trust / the developers / copyright holders / distributors.

Also, the listed translations may not have undergone a full linguistic validation process and may require further work to be suitable for use in a study.

KOOS

Arabic for Egypt
Arabic for Saudi Arabia
Bengali for India
Chinese
Croatian for Croatia*
Czech for Czech Republic*
Danish for Denmark
Dutch for the Netherlands
English for Singapore
Estonian for Estonia
French for France
German for Austria*
German for Germany
Greek for Greece
Hindi for India
Icelandic for Iceland
Italian for Italy
Japanese for Japan
Kannada for India
Korean for Korea
Latvian for Latvia*
Lithuanian for Lithuania*
Malay
Malayalam for India
Marathi for India
Norwegian for Norway
Persian
Polish for Poland
Portuguese for Brazil
Portuguese for Portugal
Russian for Russia
Slovak for Slovakia*
Slovenian for Slovenia*
Spanish for Peru
Spanish for Spain
Spanish for the USA
Tamil for India
Telugu for India
Thai for Thailand
Turkish for Turkey
Ukrainian for Ukraine*
Urdu for India
Vietnamese for Vietnam
* Performed by Mapi

More information on translations

For information on, or permission to use the translations, please contact:

KOOS web manager

  

Copies of the other translations:

Available on www.koos.nu

 

Bibliographic reference of the German version:

Kessler S, Lang S, Puhl W, Stove J. [The Knee Injury and Osteoarthritis Outcome Score--a multifunctional questionnaire to measure outcome in knee arthroplasty] Z Orthop Ihre Grenzgeb. 2003 May-Jun;141(3):277-82. German

 

Bibliographic reference of the Singapore English and Chinese versions:

Xie F, Li SC, Roos EM, Fong KY, Lo NN, Yeo SJ, Yang KY, Yeo W, Chong HC, Thumboo J. Cross-cultural adaptation and validation of Singapore English and Chinese versions of the Knee injury and Osteoarthritis Outcome Score (KOOS) in Asians with knee osteoarthritis in Singapore. Osteoarthritis Cartilage. 2006 Nov;14(11):1098-103. Epub 2006 Jun 30

Descriptive information

Characteristics

Concept of interest
  • Health-Related Quality of Life - HRQL (incl. health status)
Number of items

42

Population for intended use
  • Adult
Population age range
13 to 79 years
Administration mode
  • Self-administered
Data collection mode
  • Paper and pen
Recall/Observation period
Last week
Time for completion
About 10 minutes

Domain(s) covered by the questionnaire

  • Pain (9 items)
  • Other symptoms (7 items)
  • Activities of Daily Living function (17 items)
  • Sport and recreation function (5 items)
  • Knee-related quality of life (4 items)

Scoring

Response options:
    Yes/no 
    5-point Likert scale
    Visual Analog Scale (VAS)
    Other
Available scores:
    Global score
    Scores by dimension ranging from 0 to 100
    Scores by items
Weighting:
    Yes 
    No
Score direction:
    Higher score = better QoL
    Lower score = better QoL

Existence of a scoring/interpretation/user manual

Scoring manual and User's Guide are available on www.koos.nu

Content validity documentation

We have given each item below a number to indicate the level of information we have available. Our key indicates the following:
- Grade 1: information not found
- Grade 2: information mentioned
- Grade 3: information documented
- Grade 4: information documented and access to the source materials provided/possible

Concept elicitation and Item generation

    Literature review: the KOOS is based on the WOMAC Osteoarthritis Index and a literature review - Grade 3    Instruments review - Grade 3    Focus group: Not detailed - Grade 1    In-depth interviews with patients - Grade 2    Health care professionals interviews: Orthopaedic surgeons and physical therapists from both Sweden and the USA - Grade 2

Instrument development

    - Choice of the data collection method: Not detailed - Grade 1

    - Choice of the recall period: 1 week. Shortest thinkable where a clinical difference may occur and long enough to allow all functions to be performed during the recall time - Information provided by the author, Grade 2

    - Choice of the response options: according to WOMAC. A VAS was tried first, but the lengthy instructions to patients made authors switch to Likert-boxes - Information provided by the author, Grade 2

    - Evaluation of patient understanding: 

                Readability / understanding - Grade 2                Analysis of patient interviews - Grade 1                Pilot-testing: Patients who had meniscus surgery 20 years previously; n=75 - Grade 2

    - International issues (translatability): Not detailed - Grade 1

    - Choice of format, development of administration instructions and training: Not detailed - Grade 1

    - Identification of preliminary scoring of items and dimensions: Not detailed - Grade 1

    - Assessment of respondent and administrator burden: Not detailed - Grade 1

Identification of the conceptual framework

Not detailed - Grade 1

Instrument final version

     Modification(s) of items: item reduction, factor analysis, multi-trait analysis - Grade 2
     Re-testing of the final version of the instrument with patients - Grade 2

Bibliographic references

Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther 1998; 28:88-96 (PubMed Abstract)

Measurement properties

Reliability

Internal consistency reliability

Information not specified for the population for which the instrument was developed

Test-retest reliability (reproducibility)

- ICC:0.85 for pain, 0.93 for symptoms, 0.75 for ADL, 0.81 for sport and recreation function, 0.86 for knee-related quality of life; p= not specified
- Population/Disease:Subjects about to undergo anterior cruciate ligament reconstruction; n= 13
- Was a definition of stability applied to identify stable patients:No
- Time frame or interval between the two administrations:9 days

Reference:
Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther 1998; 28:88-96 (PubMed Abstract)

Validity

Clinical validity

Information not specified for the population for which the instrument was developed

Ability to detect change

More information in:

Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther 1998; 28:88-96 (PubMed Abstract)

Roos EM, Roos HP, Ekdahl C, Lohmander LS. Knee injury and Osteoarthritis Outcome Score (KOOS)--validation of a Swedish version. Scand J Med Sci Sports 1998;8:439-48 (PubMed Abstract)

 

Interpretability

Minimal Important Difference (MID):8 to 10 may represent the MID
Reference:
Roos EM, Lohmander LS. The Knee injury and Osteoarthritis Outcome Score (KOOS): from joint injury to osteoarthritis. Health Qual Life Outcomes. 2003 Nov 3;1(1):64 (Full text article)

References and websites

Bibliographic reference(s) of the original questionnaire

Roos EM, Roos HP, Ryd L, Lohmander LS. Substantial disability 3 months after arthroscopic partial meniscectomy: A prospective study of patient-relevant outcomes. Arthroscopy 2000; 16:619-26 (PubMed Abstract)

Roos EM, Roos HP, Lohmander LS. WOMAC Osteoarthritis Index--additional dimensions for use in subjects with post-traumatic osteoarthritis of the knee. Western Ontario and MacMaster Universities. Osteoarthritis Cartilage 1999; 7(2):216-2 (PubMed Abstract)

Roos EM, Roos HP, Ekdahl C, Lohmander LS. Knee injury and Osteoarthritis Outcome Score (KOOS)--validation of a Swedish version. Scand J Med Sci Sports 1998;8:439-48 (PubMed Abstract)

Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther 1998; 28:88-96 (PubMed Abstract)

Related website(s)
Other bibliographic reference(s)

- See(PubMed results)