Flatfoot, Foot Deformities
Conditions
Keywords
Foot Posture Index, FPI-6, Validation Study, Reliability, Spanish Version
Brief summary
The objective of this study is to translate, cross-culturally adapt, and validate the Spanish version of the Foot Posture Index (FPI-6). This clinical tool is widely used to evaluate standing foot posture through six visual criteria. The study aims to provide Spanish-speaking clinicians and researchers with a reliable and valid instrument to assess foot posture in the Spanish population, ensuring that the psychometric properties of the original scale are preserved
Detailed description
This study follows a prospective, observational design and will be carried out in two phases: Phase 1: Translation and Cross-Cultural Adaptation. Following international standards (forward-backward translation method), the original English FPI-6 will be translated into Spanish by two independent translators. A synthesis version will be created, followed by a back-translation into English to ensure conceptual equivalence. A pilot test will be conducted to ensure the clarity of the items. Phase 2: Validation and Psychometric Evaluation. The Spanish version of the FPI-6 will be administered to a sample of participants. To evaluate reliability, intra-rater and inter-rater reliability will be calculated using the Intraclass Correlation Coefficient (ICC). Internal consistency will be assessed using Cronbach's alpha. Construct validity will be analyzed by comparing FPI-6 scores with other validated clinical measures of foot posture
Interventions
OTHERSpanish version of the Foot Posture Index (FPI-6)
The assessment consists of the clinical application of the Spanish version of the Foot Posture Index (FPI-6). This is a non-invasive observational method where the investigator evaluates six specific criteria of the foot while the participant stands in a relaxed position. The six criteria include: talar head palpation, supra and infra-malleolar curvature, calcaneal frontal plane position, prominence in the region of the talonavicular joint, congruence of the internal longitudinal arch, and abduction/adduction of the forefoot on the rearfoot. Each item is scored between -2 and +2, providing a total score between -12 and +12
Sponsors
Paloma López Ros
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
6 Years to 89 Years
Healthy volunteers
Yes
Inclusion criteria
* Participants aged between 6 and 89 years * Ability to understand and sign the informed consent form. In the case of minors, written informed consent from parents or legal guardians and child's assent (where applicable) are required * Ability to maintain a relaxed standing position unassisted for the duration of the clinical assessment
Exclusion criteria
* History of major surgery or significant trauma in the lower limbs or feet. * Presence of open wounds or active skin infections on the feet at the time of the examination. * Neurological or musculoskeletal conditions that severely affect balance or standing posture. * Cognitive impairment that prevents the participant from following simple clinical instructions
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Intra-rater and Inter-rater Reliability of the Spanish FPI-6 | Baseline and 7-14 days later | Consistency of the Foot Posture Index (FPI-6) scores evaluated through the Intraclass Correlation Coefficient (ICC). Intra-rater reliability will be assessed by one examiner repeating the test after 1-2 weeks. Inter-rater reliability will be assessed by two examiners evaluating each subject with a one-hour interval. |
| Internal Consistency of the Spanish FPI-6 | At Baseline (Day 1) | Measured using Cronbach's alpha to ensure that all six items of the FPI-6 contribute coherently to the total score. A value \> 0.70 is expected. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Criterion Validity | At Baseline (Day 1) | Correlation of the Spanish FPI-6 total score with the Foot Function Index (FFI) and the American Orthopaedic Foot and Ankle Society (AOFAS) scale using Spearman's correlation |
Contacts
CONTACTPaloma López Ros, PhD
PRINCIPAL_INVESTIGATORJonatan García-Campos, PhD
Universidad Miguel Hernández
PRINCIPAL_INVESTIGATORJavier Marco-Lledó, PhD
Universidad Miguel Hernández
PRINCIPAL_INVESTIGATORVicenta Martínez-Córcoles, PhD
Universidad Miguel Hernández
PRINCIPAL_INVESTIGATORRoberto Pascual-Gutiérrez, MSc
Universidad Miguel Hernández
PRINCIPAL_INVESTIGATORLaura Tabernero-Grau, MSc
Universidad Miguel Hernández
PRINCIPAL_INVESTIGATORDavid Montoro-Cremades, MSc
Universidad Miguel Hernández
STUDY_DIRECTORPaloma López Ros, PhD
Universidad Miguel Hernández
Outcome results
None listed