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IdFAI · Identification of Functional Ankle Instability

10 items · 3 min · 0–37 · lower is better

1 Before you use it

What it is

An alternative to CAIT for identifying functional ankle instability, covering history of sprains, giving way frequency, and instability during activity.

Note the direction is the opposite of CAIT.

When to reach for it

As the CAIT alternative. Pick one for the service and stay with it.

Patterns it serves · 1

2 Giving it

Scoring

Ten items, weighted, totalling 0–37. Higher means more instability.

What it doesn’t measure

Mechanical laxity or balance.

3 Reading the score

Interpreting it

**A cut-point around 11 is commonly cited.

Is the change real?

MDC 3.8 points. Compare the change against this patient's own baseline as well as the figure. SourceMeasured in chronic ankle instability.

Student trap. Recording it like CAIT. Higher is worse here and better there.

Official source: null. We don't host the form.

This is a learning tool. It does not diagnose patients and does not replace your clinical educator.

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