Validation of the Identification of Functional Ankle Instability (IdFAI) in Italian

Study Overview
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Brief Summary
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The purpose of the study is actually the translation, cultural adaptation and psychometric validation in the Italian Version of the Identification of Functional Ankle Instability (IdFAI) English Version for use in outpatient clinics in non-English subjects to objectify chronic ankle instability.

Detailed Description
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The hypothesis is to translate and culturally adapt the scale successfully and demonstrate a good factorial structure and psychometric properties, replicating the results of the original English version of the questionnaire

Official Title
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Cross-cultural Translation, Adaptation and Psychometric Validation of the Functional Ankle Instability (IdFAI) in an Italian Population With or Without Ankle Instability - A Non-interventional Web-based Cross-sectional Study

Conditions
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Ankle Sprains

Intervention / Treatment
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* Other: Questionnaires administration


Participation Criteria
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Eligibility Criteria
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Participants without ankle sprain. Age ≥ 18aa Speak Italian on a daily basis No pathologies or surgical treatments in the lower limbs currently or in the past Participants with ankle sprain. Inclusion Criteria Age ≥ 18aa Speak Italian on a daily basis At least one ankle sprain Recurrent sprain to the same ankle and/or sensation of ankle instability and/or 'giving way' Exclusion Criteria Inability to understand written Italian Acute lower extremity injury occurred in the three months preceding the compilation of the questionnaire History of others lower extremity musculoskeletal diseases or injuries of other joints (i.e, hip, knee), previous ankle fractures or systemic pathologies (i.e., neurological disorders, rheumatoid arthritis) currently or in the past History of surgical treatments in either lower limb (bones, joints, nerves)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Participants with ankle sprain.<br>Participants with ankle sprain | Other: Questionnaires administration<br>* Administration of Identification of Functional Ankle Instability (IdFAI) and the following assessment scales: Self-reported question assess the ankle instability as functional/stable or not functional/unstable, Foot and Ankle ability Measure Italian Version - Activity Daily Living (FAAM-I/ADL), Short-form 36-item Health Survey Italian Version (SF-36), Numeric Rate Scale pain (NRS Pain), Visual Analogic Scale Ankle Instability (VAS ankle instability). After a week the participants will fill in the following questionnaires: Identification of Functional Ankle Instability (IdFAI), Numeric Rate Scale pain (NRS Pain), Visual Analogic Scale Ankle Instability (Vas ankle instability) with the additional question to measure the change in complaints.<br>|
| Participants without ankle sprain<br>Participants without ankle sprain | Other: Questionnaires administration<br>* Administration of Identification of Functional Ankle Instability (IdFAI) and the following assessment scales: Self-reported question assess the ankle instability as functional/stable or not functional/unstable, Foot and Ankle ability Measure Italian Version - Activity Daily Living (FAAM-I/ADL), Short-form 36-item Health Survey Italian Version (SF-36), Numeric Rate Scale pain (NRS Pain), Visual Analogic Scale Ankle Instability (VAS ankle instability). After a week the participants will fill in the following questionnaires: Identification of Functional Ankle Instability (IdFAI), Numeric Rate Scale pain (NRS Pain), Visual Analogic Scale Ankle Instability (Vas ankle instability) with the additional question to measure the change in complaints.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Psychometric parameter 1 validation of the IdFAI scale. | Sample Size homogeneity | One week | 
| Psychometric parameter 2 validation of the IdFAI scale. | Discriminant validity | One week | 
| Psychometric parameter 3 validation of the IdFAI scale. | Internal consistency | One week | 
| Psychometric parameter 4 validation of the IdFAI scale. | Construct validity | One week | 
| Psychometric parameter 5 validation of the IdFAI scale. | Test-retest reliability | One week | 
| Psychometric parameter 6 validation of the IdFAI scale. | Criterion validity: convergent and divergent validity | One week | 
| Psychometric parameter 7 validation of the IdFAI scale. | Floor and ceiling effects | One week |