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PROS
- Very quick
- Seems to have good reliability
- Good if you need to 'categorise' feet for research purposes
CONS
- Not predictive of pathology
- Does not necessarily dictate management/orthoses prescription variables
- What do you actually do with the number clinically?
FPI-6 is a very good educational tool to visualize what is going on in a pronated vs a supinated foot. Meanwhile intra-rater agreement (same rater) is high the inter-rater agreement (between-raters) is questionable.
See .e.g.
(Cornwall, M. W. , McPoil, T. G., Lebec, M., Vicanzio, B. & Wilson, J. (2008). Reliability of the modified Foot posture index. Journal of the American Podiatric Medical Association 98(1), 7-13.)
As Ian said id quick and good to give an overall picture of foot posture. Be carefull to use it between clinicians though.
Sorry Rabzash - Bjorn is right. When I referred to it's reliability I should have specified that I was referring to intra-observer reliability. I have actually just finished collecting data for a small research project myself and it certaily seems to suggest that inter-observer reliability of FPI-6 was not great.
PM me if you want a copy of the JAPMA paper above and I'll email it to you.
Hi i was just wondering whether anyone knows any information about
HOW USEFUL THE MEASURE IS IN PREDICTING DYNAMIC FUNCTION WITH REGARDS TO THE FOOT POSTURE INDEX?
FPI never claimed to be anything other than a measure/quantifier of posture. In stance.
We skate onto thin ice when we try to attribute more to a tool than it is capable of delivering. I am a fan of the FPI, but I have respect for it's limitations. It's good at what it is, but it's better to stick to it's strengths and use it for what it is.
However, I too dream of a measure that will give us objectively what we want. But this is barking up the wrong tree I think. One day.....
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Foot posture index
Linear Mode
