The present study investigates the minimal important change and validity of foot and ankle measures.
Patients who are waiting for foot and ankle surgery are recruited from four large referral centers (Peijas Hospital, Seinäjoki Central Hospital, Central Finland Central Hospital, Oulu University Hospital). Participants fill in foot and ankle-specific, generic and sosiodemographic questionnaires on the day of surgery, 6 months after surgery, and 6 months 2 weeks after surgery. Both pen-and-paper and electronic options for completing the questionnaire set are provided. The data obtained from the Foot and ankle outcome score (FAOS), European foot and ankle society (EFAS) score, modified Lower extremity functional scale (LEFS), Visual analog scale foot and ankle (VAS-FA), Manchester Oxford foot and ankle (MOxFA) questionnaire, and the Foot and ankle ability measure (FAAM) are analyzed using the Rasch Measurement Theory and several other psychometric approaches to investigate minimal important change, reliability, responsiveness and validity of foot and ankle PRO instruments.
Study Type
OBSERVATIONAL
Enrollment
290
Surgery for foot or ankle
Central Finland Central Hospital
Jyväskylä, Finland
Oulu University Hospital
Oulu, Finland
Seinäjoki Central Hospital
Seinäjoki, Finland
Peijas Hospital
Vantaa, Finland
Minimal important difference
Change from baseline scores at 6 months
Time frame: Baseline, 6 months
Reliability
Change from 6 months scores at 6.5 months
Time frame: 6 months, 6.5 months
General health question
Change from baseline scores at 6 months
Time frame: Baseline, 6 months
General health question
Change from baseline scores at 6 months
Time frame: 6 months, 6.5 months
Global assessment scale
Change from baseline scores at 6 months
Time frame: 6 months
Validity
Baseline scores
Time frame: Baseline
Validity
6 months scores
Time frame: 6 months
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