The influence of anatomical markers on the precision of body posture measurement in the DIERS Formetric 4D system – intra- and inter-rater analysis
Zuzanna Wiecheć, Arkadiusz Żurawski, Żaneta Wypych, Marek Wiecheć, Zbigniew Śliwiński
Zuzanna Wiecheć, Arkadiusz Żurawski, Żaneta Wypych, Marek Wiecheć, Zbigniew Śliwiński – The influence of anatomical markers on the precision of body posture measurement in the DIERS Formetric 4D system – intra- and inter-rater analysis – Fizjoterapia Polska 2025; 25(3); 432-440
DOI: https://doi.org/10.56984/8ZG7D193RN5
Abstract
Introduction. Diagnostics in physiotherapy is increasingly based on precise measuring devices; one of the increasingly popular in clinical practice is the DIERS Formetric 4D system. Its effectiveness has been confirmed in many studies, but there is still no assessment of the effectiveness of measurements depending on whether photosensitive anatomical markers were used.
Aim of the study. The aim of the study was to verify the effect of anatomical markers on the results of a photogrammetric examination using the DIERS Formetric system as an example.
Material and methods. The study involved 20 healthy adults. Each subject was examined three times by two independent researchers with two measurement variants – one with anatomical markers and one without markers. Seven body posture parameters were taken into account in the analysis. The intraclass correlation coefficient (ICC), standard error of measurement (SEM), minimal detectable change (MDC) and Student’s t-test and Wilcoxon test were used to determine the variability and reliability of the measurements (SEM), minimal detectable change (MDC), and Student’s t-test and Wilcoxon test.
Results. Five of the seven parameters showed slight differences. Higher values of thoracic kyphosis and lumbar lordosis angles and lower values of surface rotation and lateral deviation were obtained in measurements using markers (p < 0.05). ICC values ranged from 0.88 to 0.99, showing very high repeatability in both conditions. Slightly lower values of SEM and MDC in the case of markers indicate higher precision of this method.
Conclusions. The use of anatomical landmarks can increase both the accuracy and reliability of body posture assessment using the DIERS Formetric 4D system, which is particularly important in the case of examinations requiring a high level of precision.
Key words
DIERS Formetric 4D, rasterstereography, posture assessment, anatomical markers, repeatability of measurement, measurement accuracy
| Pobierz/Download/下載/Cкачиваете | Pobierz bezpłatnie artykuł w j. angielskim |
