The Reliability of Quantifying Upright Standing Postures as a Baseline Diagnostic Clinical Tool

Dunk, Nadine M.; Chung, Yin Yin; Compton, Diana Sullivan; Callaghan, Jack P.

doi:10.1016/j.jmpt.2004.08.009

Cited by 29 publications

(2 citation statements)

References 28 publications

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“…Sources of error in the PosturePrint ® systems' analysis of posture included: possible variation in upright stance from day to day, inherent errors due to placing markers from palpation of boney landmarks [ 26 ], errors involved in the choosing of sixteen points on the photographs via the computer mouse by each examiner, and errors in positioning the participants in the same manner relative to the reference wall grid and camera [ 27 ]. However, the high ICCs, small SEMs, and low mean absolute differences between and within examiners' measurements indicate that these sources of error were kept at a minimum.…”

Section: Discussionmentioning

confidence: 99%

“…Dunk et al [ 13 ] performed a reliability study of a photographic technique and consequent digitization of reflective landmarks with 14 participants and reported poor to moderate ICCs for posture reliability. After a letter to the editor [ 27 ] critical of their 2004 study [ 13 ], in a follow up study [ 14 ], Dunk et al assessed the intra-examiner reliability with more (20) healthy participants. Dunk et al concluded that their sagittal plane measures were more reliable than coronal plane measures, but their sagittal plane angles of spinal curvature had mean error of approximately 6° while their coronal plane bending had mean error less than 2° [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

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Three dimensional evaluation of posture in standing with the PosturePrint: an intra- and inter-examiner reliability study

et al. 2007

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BackgroundFew digitizers can measure the complexity of upright human postural displacements in six degrees of freedom of the head, rib cage, and pelvis.MethodsIn a University laboratory, three examiners performed delayed repeated postural measurements on forty subjects over two days. Three digital photographs (left lateral, AP, right lateral) of each of 40 volunteer participants were obtained, twice, by three examiners. Examiners placed 13 markers on the subjects before photography and chose 16 points on the photographic images. Using the PosturePrint® internet computer system, head, rib cage, and pelvic postures were calculated as rotations (Rx, Ry, Rz) in degrees and translations (Tx, Tz) in millimeters. For reliability, two different types (liberal = ICC3,1 & conservative = ICC2,1) of inter- and intra-examiner correlation coefficients (ICC) were calculated. Standard error of measurements (SEM) and mean absolute differences within and between observers' measurements were also determined.ResultsAll of the "liberal" ICCs were in the excellent range (> 0.84). For the more "conservative" type ICCs, four Inter-examiner ICCs were in the interval (0.5–0.6), 10 ICCs were in the interval (0.61–0.74), and the remainder were greater than 0.75. SEMs were 2.7° or less for all rotations and 5.9 mm or less for all translations. Mean absolute differences within examiners and between examiners were 3.5° or less for all rotations and 8.4 mm or less for all translations.ConclusionFor the PosturePrint® system, the combined inter-examiner and intra-examiner correlation coefficients were in the good (14/44) and excellent (30/44) ranges. SEMs and mean absolute differences within and between examiners' measurements were small. Thus, this posture digitizer is reliable for clinical use.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Three dimensional evaluation of posture in standing with the PosturePrint: an intra- and inter-examiner reliability study

et al. 2007

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Concurrent validity of photogrammetric and inclinometric techniques based on assessment of anteroposterior spinal curvatures

et al. 2017

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Purpose The purpose of the study was to investigate correlations between parameters of anteroposterior spinal curvatures in the sagittal plane, measured with the use of photogrammetric technique and inclinometer in healthy elderly women. Methods Randomized study involved 50 females, ranging from 50 to 70 years of age (mean 62.26 ± 6.94); mean body mass index (BMI) 27.69 ± 4.79. The examined parameters included angle of inclination in lumbosacral spine (ALFA), thoracolumbar transition (BETA), upper thoracic segment (GAMMA), angle of lumbar lordosis (LLA) and thoracic kyphosis (TKA). Results obtained with gravitational inclinometer were compared with those identified with photogrammetry method. Statistical analyses were performed with Mann-Whitney U test, regression analysis and Bland-Altman analysis. Results In Mann-Whitney U test, with correction due to continuity, no statistically significant differences for any variable were found. Regression analysis was significant only for the variable of BETA angle. Bland-Altman coefficient for the respective angles was: ALFA 2.0%, BETA 4%, GAMMA 0%, LLA 2% and TKA 0%. Conclusions The results acquired with gravitational inclinometer and with photogrammetric technique are comparable, as the parameters of anteroposterior spinal curvatures acquired with these two methods are found to be compatible in the case of measurements of lumbar lordosis and thoracic kyphosis.

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Between-session reliability of opto-electronic motion capture in measuring sagittal posture and 3-D ranges of motion of the thoracolumbar spine

Mousavi

Tromp

Swann

et al. 2018

Journal of Biomechanics

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This study evaluated between-session reliability of opto-electronic motion capture to measure trunk posture and three-dimensional ranges of motion (ROM). Nineteen healthy participants aged 24-74 years underwent spine curvature, pelvic tilt and trunk ROM measurements on two separate occasions. Rigid four-marker clusters were attached to the skin overlying seven spinous processes, plus single markers on pelvis landmarks. Rigid body rotations of spine marker clusters were calculated to determine neutral posture and ROM in flexion, extension, total lateral bending (left-right) and total axial rotation (left-right). Segmental spine ROM values were in line with previous reports using opto-electronic motion capture. Intraclass correlation coefficients (ICC) and standard error of measurement (SEM) were calculated as measures of between-session reliability and measurement error, respectively. Retroreflective markers showed fair to excellent between-session reliability to measure thoracic kyphosis, lumbar lordosis, and pelvic tilt (ICC = 0.82, 0.63, and 0.54, respectively). Thoracic and lumbar segments showed highest reliabilities in total axial rotation (ICC = 0.78) and flexion-extension (ICC = 0.77-0.79) ROM, respectively. Pelvic segment showed highest ICC values in flexion (ICC = 0.78) and total axial rotation (ICC = 0.81) trials. Furthermore, it was estimated that four or fewer repeated trials would provide good reliability for key ROM outcomes, including lumbar flexion, thoracic and lumbar lateral bending, and thoracic axial rotation. This demonstration of reliability is a necessary precursor to quantifying spine kinematics in clinical studies, including assessing changes due to clinical treatment or disease progression.

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The Reliability of Quantifying Upright Standing Postures as a Baseline Diagnostic Clinical Tool

Cited by 29 publications

References 28 publications

Three dimensional evaluation of posture in standing with the PosturePrint: an intra- and inter-examiner reliability study

Three dimensional evaluation of posture in standing with the PosturePrint: an intra- and inter-examiner reliability study

Concurrent validity of photogrammetric and inclinometric techniques based on assessment of anteroposterior spinal curvatures

Between-session reliability of opto-electronic motion capture in measuring sagittal posture and 3-D ranges of motion of the thoracolumbar spine

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