Reliability and Accuracy of Static Parameters Obtained From Ink and Pressure Platform Footprints

NewsBot · Aug 29, 2016

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Reliability and Accuracy of Static Parameters Obtained From Ink and Pressure Platform Footprints
Juan Carlos Zuil-Escobar et al
The Journal of Manipulative and Physiological Therapeutics; Article in Press

Objective
The purpose of this study was to evaluate the accuracy and the intrarater reliability of arch angle (AA), Staheli Index (SI), and Chippaux-Smirak Index (CSI) obtained from ink and pressure platform footprints.

Methods
We obtained AA, SI, and CSI measurements from ink pedigraph footprints and pressure platform footprints in 40 healthy participants (aged 25.65 ? 5.187 years). Intrarater reliability was calculated for all parameters obtained using the 2 methods. Standard error of measurement and minimal detectable change were also calculated. A repeated-measure analysis of variance was used to identify differences between ink and pressure platform footprints. Intraclass correlation coefficient and Bland and Altman plots were used to assess similar parameters obtained using different methods.

Results
Intrarater reliability was >0.9 for all parameters and was slightly higher for the ink footprints. No statistical difference was reported in repeated-measure analysis of variance for any of the parameters. Intraclass correlation coefficient values from AA, SI, and CSI that were obtained using ink footprints and pressure platform footprints were excellent, ranging from 0.797 to 0.829. However, pressure platform overestimated AA and underestimated SI and CSI.

Conclusions
Our study revealed that AA, SI, and CSI were similar regardless of whether the ink or pressure platform method was used. In addition, the parameters indicated high intrarater reliability and were reproducible.
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NewsBot · Apr 11, 2017

Variability between Clarke's angle and Chippaux-Smirak index for the diagnosis of flat feet
Cristina Gonzalez-Martin et al
Home > Vol 48, No 1 (2017) > González-Martín

Background:
The measurements used in diagnosing biomechanical pathologies vary greatly. The aim of this study was to determine the concordance between Clarke's angle and Chippaux-Smirak index, and to determine the validity of Clarke's angle using the Chippaux-Smirak index as a reference.
Methods:
Observational study in a random population sample (n= 1,002) in A Coruña (Spain). After informed patient consent and ethical review approval, a study was conducted of anthropometric variables, Charlson comorbidity score, and podiatric examination (Clarke's angle and Chippaux-Smirak index). Descriptive analysis and multivariate logistic regression were performed.
Results:
The prevalence of flat feet, using a podoscope, was 19.0% for the left foot and 18.9% for the right foot, increasing with age. The prevalence of flat feet according to the Chippaux-Smirak index or Clarke's angle increases significantly, reaching 62.0% and 29.7% respectively. The concordance (kappa I) between the indices according to age groups varied between 0.25-0.33 (left foot) and 0.21-0.30 (right foot). The intraclass correlation coefficient (ICC) between the Chippaux-Smirak index and Clarke's angle was -0.445 (left foot) and -0.424 (right foot). After adjusting for age, body mass index (BMI), comorbidity score and gender, the only variable with an independent effect to predict discordance was the BMI (OR= 0.969; 95% CI: 0.94-0.998).
Conclusion:
There is little concordance between the indices studied for the purpose of diagnosing foot arch pathologies. In turn, Clarke's angle has a limited sensitivity in diagnosing flat feet, using the Chippaux-Smirak index as a reference. This discordance decreases with higher BMI values.
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NewsBot · Mar 9, 2021

Validity and Diagnostic Accuracy of Clarke's Angle in Determining Paediatric Flexible Flatfoot Using Radiographic Findings as a Criterion Standard Measure: A Cross-Sectional Study
Fatma Hegazy, Emad Aboelnasr, Amr A Abdel-Aziem, In-Ju Kim
J Am Podiatr Med Assoc. 2021 Mar 8;20-133

Background: Clinical diagnosis of Paediatric flexible flatfoot is still a challenging issue for the healthcare professionals. Clarke's Angle (CA) is frequently used clinically for assessing foot posture; however there is still a debate about its validity and diagnostic accuracy in evaluation of static foot posture especially in Paediatric population with some previous studies supporting, while the others are refuting its validity. The current study aimed to investigate validity and diagnostic accuracy of CA using radiographic findings as a criterion standard measure to determine flexible flatfoot between ages of 6-18 years.

Methods: A cross-sectional study conducted on 612 participants (1224 feet) with flexible flatfoot aged 6-18 years (12.36 {plus minus}3.39) was recruited. The clinical measures results were compared to the criterion standard radiographic measures and displayed on the receiver operating characteristic curve (ROC) and the area under ROC curve (AUC) was computed. Intra-rater reliability, sensitivity, specificity, predictive values, and likelihood ratios were calculated for CA. Fagan nomogram was used to detect the posttest probability.

Results: Clarke's angle (CA) demonstrated higher intra-rater reliability (ICC=0.99). CA showed higher sensitivity (98.4%), specificity (98.8), positive predictive value (97.3), negative predictive value (99.3), positive likelihood ratio (84) and negative likelihood ratio (0.02). AUC was 0.98[95%CI= 0095-1.00]. The positive likelihood ratio (LR+) yielded a posttest probability of 97%, while the negative likelihood ratio (LR-) yielded a posttest probability of 0.02.

Conclusions: CA is a valid with high diagnostic accuracy in diagnosis of flexible flatfoot between the ages of 6-18 years.
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Reliability and Accuracy of Static Parameters Obtained From Ink and Pressure Platform Footprints

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Reliability and Accuracy of Static Parameters Obtained From Ink and Pressure Platform Footprints

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

Reliability of self-identification of hallux valgus

Reliability and readability of clubfoot online resources

Reliability of a Qualitative Video Analysis for Running

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The reliability of the neutral measurement of the subtalar joint

Validity and Reliability of the Tri-axial Accelerometer of the iPod Touch

Reliability of ultrasound for measurement of selected foot structures

Share This Page

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