The Foot and Ankle Flexibility Index (FAFI)
The FAFI assesses the specific (hyper)mobility of the paediatric foot and ankle, and correlates with the LLAS, and the Beighton scale.
This is a new tool for identifying joint hypermobility of the paediatric foot and ankle, based on the Lower Limb Assessment Score (the last 7 items pertinent to foot and ankle).
FAFI consists of 6 foot and ankle items, and the demonstrated cut-off score ≥ 4/6 indicates foot and ankle joint hypermobility.
A significant correlation was found between FAFI, LLAS (r=0.923), and FAFI and the Beighton score (r=0.437).
FAFI is the first tool to identify foot and ankle hypermobility (sensitivity 95%, specificity 86%), and high reliability between examiners.
We should discard general hypermobility tests and focus on FAFI for research in the foot and ankle area.
Reference: https://www.sciencedirect.com/science/article/pii/S0965206X2400072X?via%3Dihub
