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The minimal important change is not a universal fixed value across diagnoses when using the FAOS and FAAM in patients undergoing elective foot and ankle surgery. | LitMetric

AI Article Synopsis

  • * Researchers collected data from patients before and after surgery, categorizing them by the type of foot and ankle issue and using various methods to calculate MICs, finding significant differences based on the area of the foot affected.
  • * Results showed that MICs varied widely between different foot and ankle conditions, suggesting that these scores shouldn't be treated as universal benchmarks but rather as context-dependent indicators to aid doctors and researchers in understanding patient outcomes.

Article Abstract

Purpose: This study aimed to calculate region and diagnosis-specific minimal important changes (MICs) of the Foot and Ankle Outcome Score (FAOS) and the Foot and Ankle Ability Measure (FAAM) in patients requiring foot and ankle surgery and to assess their variability across different foot and ankle diagnoses.

Methods: The study used routinely collected data from patients undergoing elective foot and ankle surgery. Patients had been invited to complete the FAOS and FAAM preoperatively and at 3-6 months after surgery, along with two anchor questions encompassing change in pain and daily function. Patients were categorised according to region of pathology and subsequent diagnoses. MICs were calculated using predictive modelling (MIC) and receiver operating characteristic curve (MIC) method and evaluated according to strict credibility criteria.

Results: Substantial variability of the MICs between forefoot and ankle/hindfoot region was observed, as well as among specific foot and ankle diagnoses, with MIC and MIC values ranging from 7.8 to 25.5 points and 9.4 to 27.8, respectively. Despite differences between MIC and MIC estimates, both calculation methods exhibited largely consistent patterns of variation across subgroups, with forefoot conditions systematically showing smaller MICs than ankle/hindfoot conditions. Most MICs demonstrated high credibility; however, the majority of the MICs for the FAOS symptoms subscale and forefoot conditions exhibited insufficient or low credibility.

Conclusion: The MICs of the FAOS and FAAM vary across foot and ankle diagnoses in patients undergoing elective foot and ankle surgery and should not be used as a universal fixed value, but recognised as contextual parameters. This can help clinicians and researchers in more accurate interpretation of the FAOS and FAAM change scores.

Level Of Evidence: Level IV.

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Source
http://dx.doi.org/10.1002/ksa.12308DOI Listing

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