The Hip Disability and Osteoarthritis Outcome Score, Joint Replacement (HOOS JR.) is an outcome reporting tool that was validated in 2015. It’s been receiving interest from the orthopedic community as an efficient and reliable alternative to the longer Hip Disability and Osteoarthritis Outcome Score (HOOS) reporting measure.

The widely used HOOS questionnaire measures joint-specific pain and physical function, and contains 42 questions. By contrast, the HOOS JR. has six questions.

Questions in HOOS JR. are taken directly from the parent questionnaire and focus on the three categories: joint pain, stiffness, and function in daily living instead of the five categories in the HOOS Survey: pain, function in daily living, function in sport and recreation, other symptoms, and knee-related quality of life.

In the HOOS JR. questionnaire, patients rate each activity by indicating the amount of pain or disability they experience while carrying them out. Raw scores are added up and then converted to an interval score (0-100) using an interval table. The final interval score represents a patient’s total joint disability where 0 corresponds to total joint disability and 100 is perfect joint health.

The brevity of the HOOS, JR. survey allows for faster completion and greater patient engagement.

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The main advantage of the HOOS JR patient-reported outcome measure is its significantly shortened length. With a completion time of under 3 minutes, it’s an attractive alternative to the longer HOOS. Scoring of HOOS JR is also faster and easier to apply than the full HOOS.

Additionally, HOOS JR. has also been validated by the Hunger Sensitivity Score (HSS) validation cohort and the FORCE-TJR registry.


As a newly validated outcome measure there is very little literature at present about the HOOS JR. Over time further studies and research should help provide a more complete picture about the robustness and reliability of the HOOS JR. as an outcome reporting measure.


The HOOS JR. does not require a license and is free to use.


    1. The joint commission: Candidate Performance Measure Profile –

    1. Patient Reported Outcomes Summit for Total Joint Arthroplasty Report. August 2015 –

    1. Joint Communication from the American Association of Orthopaedic Surgeons, the American joint replacement registry, The Hip Society, The Knee Society, and the American Association of Hip and Knee Surgeons. Issued 8 September 2015. –

    1. Roos, E. M., & Lohmander, L. S. (2003). The Knee injury and Osteoarthritis Outcome Score (KOOS): from joint injury to osteoarthritis. Health and Quality of Life Outcomes, 1, 64.

    1. Peer MA, Lane J. J Orthop Sports Phys Ther. 2013 Jan;43(1):20-8. doi: 10.2519/jospt.2013.4057. Epub 2012 Dec 7. Review. –

    1. Davis, A. M., Perruccio, A. V., Canizares, M., Hawker, G. A., Roos, E. M., Maillefert, J. F., & Lohmander, L. S. (2009). Comparative, validity and responsiveness of the HOOS-PS and KOOS-PS to the WOMAC physical function subscale in total joint replacement for osteoarthritis. Osteoarthritis and Cartilage, 17(7), 843-847. –