Introduction
The Foot and Ankle Outcome Score (FAOS) is a patient-reported outcome survey that measures the function of the ankle and foot joint complex and provides important information regarding ankle-related physical limitation and disability . It has been recommended by the International Ankle Consortium to evaluate functional imitations of individuals with chronic ankle insufficiency and is one of the most frequently used foot and ankle-specific measures.
The FAOS was first described in 2001 by Dr. Ewa M. Roos, Dr. Sveinbjörn Brandsson, and Dr. Jon Karlsson as an adaptation of the Knee Injury and Osteoarthritis Outcome Score (KOOS).
The FAOS consists of 42 items distributed among 5 subscales: Symptoms (7 items), Pain (9 items), Activities of Daily Living (17 items), Sports and Recreation (5 items), and Quality of Life (4 items).
Each item consists of a 5-point Likert scale scored from 0 to 4. A value of 0 indicates no pain, symptomatology, or functional limitations, while a value of 4 indicates the worst possible pain, symptomatology, or functional limitations. The final total FAOS score is a transformation from the total raw score that ranges from 0 to 100 representing worst to best outcomes, respectively.
The FAOS is free to use and does not have any licensing requirements.
Use the following EVALUATION FORM to evaluate your patient and PRINT THE FORM when the evaluation is completed.
References
- Goulart Neto AM, Maffulli N, Migliorini F, de Menezes FS, Okubo R. Validation of Foot and Ankle Ability Measure (FAAM) and the Foot and Ankle Outcome Score (FAOS) in individuals with chronic ankle instability: a cross-sectional observational study. Journal of orthopaedic surgery and research. 2022 Dec;17(1):1-7.
- Terada M, Harkey MS, Wells AM, Pietrosimone BG, Gribble PA. The influence of ankle dorsiflexion and self-reported patient outcomes on dynamic postural control in participants with chronic ankle instability. Gait & posture. 2014 May 1;40(1):193-7.
- Sierevelt IN, Zwiers R, Schats W, Haverkamp D, Terwee CB, Nolte PA, Kerkhoffs GM. Measurement properties of the most commonly used Foot-and Ankle-Specific Questionnaires: the FFI, FAOS and FAAM. A systematic review. Knee Surgery, Sports Traumatology, Arthroscopy. 2018 Jul;26(7):2059-73.
- Roos EM, Brandsson S, Karlsson J. Validation of the foot and ankle outcome score for ankle ligament reconstruction. Foot & Ankle International. 2001 Oct;22(10):788-94.
- Tapaninaho K, Uimonen MM, Saarinen AJ, Repo JP. Minimal important change for foot and ankle outcome score (FAOS). Foot and Ankle Surgery. 2022 Jan 1;28(1):44-8.