What is the FADI used for?

The Foot and Ankle Disability Index measures how foot and ankle conditions affect a patient's daily activities and pain. Clinicians use it to quantify function at baseline, set rehabilitation goals, and track recovery across a course of care. It suits ankle sprains, chronic instability, and postoperative follow-up in outpatient settings.

How is the FADI scored?

The FADI has 26 items rated from 0 to 4, giving a maximum of 104 points. Function items range from 0 (unable to do) to 4 (no difficulty), while pain items run from 0 (unbearable) to 4 (none). The raw total is converted to a percentage, where 100% represents no dysfunction.

What is a good FADI score?

Higher percentages reflect better function, and 100% means no reported dysfunction. There are no universal severity bands, so scores are best read against a patient's own baseline. Research reports a minimal detectable change of roughly 4.5 points, which helps you judge whether a change reflects real improvement rather than measurement noise.

What is the difference between the FADI and FADI Sport?

The core FADI has 26 items focused on daily activities and pain. The FADI Sport is a separate 8-item subscale that adds higher-demand tasks such as running, jumping, and cutting. The two are scored independently as percentages, and the Sport subscale is often used with athletes returning to activity.

Is the FADI free to use?

Yes. The FADI is freely available for clinical and research use and carries no licensing fee, which makes it practical for routine outpatient physical therapy. As with any outcome measure, cite the original developers and use the validated wording rather than modifying items.

How often should the FADI be administered?

Many clinics administer the FADI at the initial evaluation to set a baseline, then repeat it at regular intervals and at discharge. Re-administering on a consistent schedule lets you compare scores over time and see whether function is improving across the episode of care.

Foot and Ankle Disability Index | Template & auto-scoring

The Foot and Ankle Disability Index (FADI) is a 26-item patient-reported outcome measure that captures how foot and ankle problems affect daily activities and pain. Patients rate each item on a five-point scale, producing a percentage score where 100% reflects no dysfunction. Clinicians use it to quantify function and track recovery across a course of rehabilitation.

Why healthcare providers use the FADI

Quantifies daily function. It converts subjective foot and ankle complaints into a numeric percentage you can compare across visits.
Tracks recovery. Repeat administration shows whether an intervention is improving activity tolerance and reducing pain.
Covers pain and activity. It combines pain items with functional tasks such as walking, stairs, and standing on one leg.
Supports goal setting. A baseline score helps you set measurable rehabilitation targets and guides clinical decision-making.
No licensing cost. The FADI is freely available, so it fits routine outpatient use without added fees.

Which settings use the FADI?

Outpatient physical therapy. Therapists track function through rehabilitation for ankle sprains, instability, and post-surgical recovery.
Sports medicine. Clinicians pair the core scale with the FADI Sport subscale to monitor athletes returning to activity.
Orthopedic clinics. Surgeons use it to document function before and after foot and ankle procedures.
Athletic training. Trainers screen and follow lower-limb function in active and collegiate populations.

What does the FADI measure?

The FADI measures self-reported foot and ankle function and pain during everyday tasks. The core scale focuses on activities of daily living, while the optional FADI Sport subscale adds higher-demand movements for athletic populations. Together they describe how a foot or ankle problem limits movement across a range of activity levels.

Activities of daily living. Walking, stairs, standing, and other routine weight-bearing tasks.
Pain. Four items rate pain intensity under different conditions, from none to unbearable.
Higher-demand activity (FADI Sport). An optional subscale covering running, jumping, cutting, and low-intensity sport.

Scoring the FADI

Number of items: 26 items, plus an optional 8-item FADI Sport subscale.
Per-item scale: 0 to 4; function items run 0 (unable to do) to 4 (no difficulty), and the four pain items run 0 (unbearable) to 4 (none).
Total score range: 0 to 104 points on the core scale, then converted to a percentage from 0 to 100%.
Score direction: Higher scores indicate better function, and 100% represents no dysfunction.

The FADI has no universally validated severity bands, so a single score is best interpreted against the patient's own baseline rather than a fixed cutoff. Published work reports a minimal detectable change of about 4.5 points on the core scale, which offers a reference point for judging whether a change over time reflects real improvement rather than measurement variation. Interpret scores alongside the full clinical picture to guide clinical decision-making.

Best practices for administration

Administer at the initial evaluation to establish a baseline before treatment begins.
Re-administer at consistent intervals so scores are comparable over the episode of care.
Ask patients to rate the affected limb and to answer every item to avoid missing data.
Add the FADI Sport subscale for athletes or patients targeting a return to higher-demand activity.
Use the validated item wording without modification so scores remain comparable to published data.

How Zentake helps with the FADI

Automatic scoring. Zentake totals the FADI on submit and converts it to a percentage, with no hand-tallying.
Longitudinal tracking. Re-send the FADI on a schedule and view change over time across the course of care.
Before the visit. Patients complete the FADI from home on any device, so results are ready for physical therapy practices before the appointment.
HIPAA compliant. Responses are encrypted, and a signed BAA is included on every plan.

References

The FADI was developed by Martin and colleagues (1999) as a self-report measure of foot and ankle function and pain, with a companion 8-item FADI Sport subscale for higher-demand activity.

Eechaute and colleagues (2007) reported reliability and a minimal detectable change of about 4.5 points for the core scale. Psychometric summaries are compiled in the Shirley Ryan AbilityLab Rehabilitation Measures Database.

Last updated: August 2026

Foot and Ankle Disability Index