scholarly journals 3D Simulation of Radiographic Projections to Test and Reduce the Effect of Pelvic Tilt on the Accuracy of Cross-table Lateral Radiography

2020 ◽  
Author(s):  
Jie Xu ◽  
Baohua Su ◽  
Wenhui Zhang ◽  
Hao Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Reliable Method ◽  
Pelvic Tilt ◽  
Intra Class Correlation ◽  
High Agreement ◽  
Mathematical Algorithm ◽  
Radiographic Measurements ◽  
Pelvic Position ◽  
Intra Class Correlation Coefficient ◽  
Version Measurement

Abstract Background:Cross-table lateral (CL) radiography is aconvenientandfeasible method toassess cup version angle (VA) after total hip arthroplasty; however, the pelvic tilt (PT) may contribute to its measurement inaccuracy.We sought (1) to determinethe effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT.Methods: Two groups of VAswere measured respectively on 3D simulatedCL images and CL radiographs. Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The corrected valueswere compared with computed tomography (CT) measurements to verified the corrective formula. Results:There was a high correlation between the measurements and PTs. For each 1-degree increased in the PT, the VA decreased by 0.76° (R²=0.995, p<0.001). The VA measurements corrected by our equation was in high agreement with the CT-measured valueswithreferenceto the corresponding PT (intra-class correlation coefficient [ICC]=0.988, p<0.001), which was in sharp contrast to that without PT control (ICC=0.454, p=0.203).Conclusions: ThePT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.

scholarly journals 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Jie Xu ◽  
Baohua Su ◽  
Wenhui Zhang ◽  
Hao Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Pelvic Tilt ◽  
Intra Class Correlation ◽  
High Agreement ◽  
Mathematical Algorithm ◽  
Radiographic Measurements ◽  
Pelvic Position ◽  
The Relationship ◽  
Intra Class Correlation Coefficient ◽  
Version Measurement

Abstract Background Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied. We sought (1) to determine the effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT. Methods We used 3D technique to construct standard model and capture CL radiography simulation. A linear regression model was created to analyze the relationship between PT and VA. CL radiography and computed tomography (CT) were performed for the enrolled patients after surgery. The consistency between CL and CT measurements were verified by intra-class correlation coefficient (ICC). Results There was a high correlation between the VA and PT. For each 1-degree increased in the PT, the VA decreased by 0.76° (R2 = 0.995, p < 0.001). Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The VA measurements corrected by our equation was in high agreement with the CT-measured values with reference to the corresponding PT (ICC = 0.988, p < 0.001), which was in sharp contrast to that without PT control (ICC = 0.454, p = 0.203). Conclusions The PT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.

scholarly journals 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography

2020 ◽  
Author(s):  
Jie Xu ◽  
Baohua Su ◽  
Wenhui Zhang ◽  
Hao Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Pelvic Tilt ◽  
Intra Class Correlation ◽  
High Agreement ◽  
Mathematical Algorithm ◽  
Radiographic Measurements ◽  
Pelvic Position ◽  
The Relationship ◽  
Intra Class Correlation Coefficient ◽  
Version Measurement

Abstract Background: Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied. We sought (1) to determine the effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT. Methods: We used 3D technique to construct standard model and capture CL radiography simulation. A linear regression model was created to analyze the relationship between PT and VA. CL radiography and computed tomography (CT) were performed for the enrolled patients after surgery. The consistency between CL and CT measurements were verified by intra-class correlation coefficient (ICC). Results: There was a high correlation between the VA and PT. For each 1-degree increased in the PT, the VA decreased by 0.76° (R²=0.995, p<0.001). Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The VA measurements corrected by our equation was in high agreement with the CT-measured values with reference to the corresponding PT (ICC=0.988, p<0.001), which was in sharp contrast to that without PT control (ICC=0.454, p=0.203). Conclusions: The PT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.

scholarly journals 3D simulation of radiographic projections to test and reduce the effect of pelvic tilt on the accuracy of cross-table lateral radiography

2020 ◽  
Author(s):  
Jie Xu ◽  
Baohua Su ◽  
Wenhui Zhang ◽  
Hao Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Pelvic Tilt ◽  
Intra Class Correlation ◽  
High Agreement ◽  
Mathematical Algorithm ◽  
Radiographic Measurements ◽  
Pelvic Position ◽  
The Relationship ◽  
Intra Class Correlation Coefficient ◽  
Version Measurement

Abstract Background: Cross-table lateral (CL) radiography is a convenient and feasible method to assess cup version angle (VA) after total hip arthroplasty; However, pelvic tilt (PT) may contribute to its measurement inaccuracy. How PT affects CL radiographic measurements have not been well studied. We sought (1) to determine the effect of the PT on cup version measurement on CL radiography and (2) to develop a method for reducing measurement errors caused by the PT. Methods: We used 3D technique to construct standard model and capture CL radiography simulation. A linear regression model was created to analyze the relationship between PT and VA. CL radiography and computed tomography (CT) were performed for the enrolled patients after surgery. The consistency between CL and CT measurements were verified by intra-class correlation coefficient (ICC). Results: There was a high correlation between the VA and PT. For each 1-degree increased in the PT, the VA decreased by 0.76° (R²=0.995, p<0.001). Based on the data, we created a corrective formula to convert the radiographic measurements into values approximating the actual VA under a natural pelvic position. The VA measurements corrected by our equation was in high agreement with the CT-measured values with reference to the corresponding PT (ICC=0.988, p<0.001), which was in sharp contrast to that without PT control (ICC=0.454, p=0.203). Conclusions: The PT may contribute to cup version measurement inaccuracies on CL radiography. Our mathematical algorithm can serve as a reliable method to improve the accuracy of CL radiography.

scholarly journals Ankle size measurements with the foot in a free haning position: Reliability of the Figure-of-Eight Tape Method

1998 ◽  
Vol 54 (1) ◽  
pp. 14-16 ◽  
Author(s):  
Guy Van Herp ◽  
Talal Al Shatti
Keyword(s):  
Correlation Coefficient ◽  
Clinical Setting ◽  
Healthy Subjects ◽  
Reliable Method ◽  
Reliability And Validity ◽  
Sitting Position ◽  
Intra Class Correlation ◽  
Physiotherapy Practice ◽  
Tape Measure ◽  
Intra Class Correlation Coefficient

Ankle swelling is a commonly encountered condition in physiotherapy practice. Reliable and easy methods of quantification are required to record progress in treatment. The aim of this study was to establish the inter- and intra-reliability of the figure-of-eight tape measure for measuring ankle size. Thirty-six healthy subjects were measured in long-sitting position with the foot hanging free over the edge of a plinth. Three testers performed four measurements each for a total of 12 measurements per subject. The intra-class correlation coefficient was 0.96 for inter-tester reliability and 0.94 for intra-tester reliability. The results agree with previous reliability studies using the figure-of-eight tape method on healthy subjects. The figure-of-eight tape method is easily learned and applied. It is a reliable method for measuring ankle size. Further research is needed to demonstrate the reliability and validity of the technique in a clinical setting.

Test-Retests Reliability of Digital Photography in Measuring Quadriceps-Angle and Pelvic Tilt Angle in Healthy Population

2021 ◽  
Vol 15 (11) ◽  
pp. 3365-3367
Author(s):  
Mazhar Ali Bhutto ◽  
Azadeh Shadmehr ◽  
M. Raza Hadian ◽  
Saeed Talebian ◽  
Zeb Jehan Rana ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Tilt Angle ◽  
Pelvic Tilt ◽  
Digital Photography ◽  
Angle Measurement ◽  
The Body ◽  
Healthy Population ◽  
Intra Class Correlation ◽  
Q Angle ◽  
Intra Class Correlation Coefficient

Aim: Capturing body images through digital photography method for calculation of quadriceps angles and pelvic position in clinical assessment is an inexpensive method. The aim of this study is to evaluate the reliability of measuring Q-angle and pelvic tilt angle with digital camera and Microdicom software. Place and duration: University of Lahore and Tehran University of medical sciences, from June 2020 to June 2021 Methods: Bilateral lower limbs of fifteen healthy asymptomatic subjects were considered for calculations of desired angles. A 13-megapixel camera was used to capture images of quadriceps angle (q-angle) measurement in an anterior view and for pelvic angle measurement image in lateral view along with specific landmark markers on the body were captured. Images were transferred to Microdicom software for calculating desire angles. Three trails of procedures and Intra-class Correlation Coefficient (ICC) with 95% Confidence Interval (CI), Munro’s classification for reliability coefficients were used for the description of degrees. Standard error of measurement (SEM) was also calculated. Results: The Intra-class correlation coefficient values for right side Q- angle was 0.949(0.878-.981) and for left side it was 0.924(0.819-0.972) and <0.005 significant p-value. The ICC results for measuring pelvic title angle in the right side .990 (.975-.996) and left legs were .991 (.974-.997). Showing that the results were highly reliable and significant (p<0.005). Conclusions: The q-angle and pelvic angle measured with digital image have excellent consistency and reliability. Keywords: angle, asymptomatic, Images, pelvic, quadriceps

Development and Validation of an Instrument to Assess Horseback Mobility in Hippotherapy

2021 ◽  
pp. 003151252110365
Author(s):  
Alessandra V. Prieto ◽  
Kênnea Martins Almeida Ayupe ◽  
Ana C. A. Abreu ◽  
Paulo J. B. Gutierres Filho
Keyword(s):  
Correlation Coefficient ◽  
Factor Structure ◽  
Internal Consistency ◽  
Rater Reliability ◽  
Intra Class Correlation ◽  
Exploratory Factor Analyses ◽  
Excellent Internal Consistency ◽  
Development And Validation ◽  
Functional Gain ◽  
Intra Class Correlation Coefficient

Improvement in rider mobility represents an important functional gain for people with disabilities undergoing hippotherapy. However, there is no validated measuring instrument to track and document the rider's progress in riding activities. In this study, we aimed to develop and establish validity evidence for an instrument to assess hippotherapy participants’ mobility on horseback. We report on this development through the stages of: (a) content validation, (b) construct validation, (c) inter- and intra-rater reliability and (d) internal consistency analysis. We evaluated its factor structure with exploratory factor analyses, calculated values for inter- and intra-rater reliability using the intra-class correlation coefficient, and calculated its internal consistency using Cronbach's alpha. We followed recommendations by the Guidelines for Reporting Reliability and Agreement Studies. We found good inter-rater reliability (intra-class correlation coefficient – ICC = 0.991–0.999) and good intra-rater reliability (ICC = 0.997–1.0), and there was excellent internal consistency (Cronbach's α = 0.937–0.999). The instrument’s factor structure grouped its three domains into one factor. As this instrument is theoretically consistent and has been found to be appropriate and reliable for its intended use, it is now available for the measurement of horseback mobility among hippotherapy riders.

KATZ AND STIRRAT HAND DIAGRAM REVISITED

Hand Surgery ◽  
2010 ◽  
Vol 15 (02) ◽  
pp. 71-73 ◽  
Author(s):  
Rouin Amirfeyz ◽  
Sanchit Mehendale ◽  
Sarah Tyrrell ◽  
Raj Bhatia ◽  
Ian Leslie ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Correlation Coefficient ◽  
Carpal Tunnel ◽  
Observer Agreement ◽  
Healthy Individuals ◽  
Intra Class Correlation ◽  
Hand Surgeon ◽  
Observer Reliability ◽  
Tunnel Syndrome ◽  
Intra Class Correlation Coefficient

Katz and Stirrat devised a hand diagram, which uses subjective information from the patient for the diagnosis of carpal tunnel syndrome (CTS). They reported a good result. We tested the inter-observer and intra-observer reliability of this hand diagram. Twenty five consecutive patients with a diagnosis of CTS, 25 with other common hand and wrist problems but CTS and 25 healthy individuals were prospectively recruited. Each patient filled in a hand diagram. Two experienced hand surgeon scored the diagrams blindly on two different sittings four-week apart. The intra-class correlation coefficient (ICC) and Cohen's Kappa were used for intra and inter-observer reliability respectively. The intra-observer agreement was poor (ICC 95% 0.33–0.65) and inter-observer was fair (Kappa = 0.241). This study does not support the use of Katz and Stirrat Hand Diagram for the diagnosis of carpal tunnel syndrome in place if a thorough clinical examination.

scholarly journals Reliability, Stability and Validity of the Brazilian Adaptation of the Oliveira Questionnaire on Low Back Pain in Young People

2017 ◽  
Vol 30 (10) ◽  
pp. 691 ◽  
Author(s):  
Debora Soccal Schwertner ◽  
Raul Oliveira ◽  
Ana Paula Ramos Marinho ◽  
Magnus Benetti ◽  
Thais Silva Beltrame ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Young People ◽  
Correlation Coefficient ◽  
Internal Consistency ◽  
Low Back ◽  
Intra Class Correlation ◽  
Brazilian Version ◽  
Spearman’S Correlation ◽  
Intra Class Correlation Coefficient

Introduction: The objective of this study was to adapt the Brazilian version, and verify the validity, reliability and internal consistency of the Oliveira questionnaire on low back pain in young people.Material and Methods: The questionnaire was translated from European Portuguese into Brazilian Portuguese by means of translation and re-translation. The validity of the contents was determined by experts who analyzed the clarity and pertinence of the questions. Fifteen young people aged 15 to 18 took part in the pre-test step (qualitative analysis), 40 in the test-retest (reliability) and 679 in the evaluation of internal consistency. The intra-class correlation coefficient and Spearman’s correlation coefficient were used in the reliability analysis (test-retest), and Cronbach’s alpha to determine the internal consistency (stability).Results: In the translation phase the questionnaire was modified and considered suitable, observing similarity and equivalence of the two versions. After being corrected by the experts in the validation of the contents, the instrument was considered suitable and valid, and in the pre-test, the young people suggested some modifications to make the questionnaire more succinct. With respect to reliability, the values for the intra-class correlation coefficient were between 0.512 – acceptable and 1 – excellent and Spearman’s correlation coefficient varied between 0.525 and 1, classifying the instrument as reproducible. The internal consistency was considered acceptable with a 0.757 Cronbach’s alpha.Discussion: The Oliveira questionnaire was choosen since it has been used in several Portuguese studies; moreover, it addresses the need to raise data regarding low back pain and associated risk factors.Conclusions: The Brazilian version of the Oliveira questionnaire on low back pain in young people showed valid and reliable cultural adaptation, with good reliability and stability.

scholarly journals The Effect of Interactive Multiple Intelligences Activities Flip Module: Its Effects on Students’ Multiple Intelligences

2019 ◽  
Vol 8 (11) ◽  
pp. 342-348
Keyword(s):  
Multiple Intelligences ◽  
Test Analysis ◽  
Pedagogical Tool ◽  
Intra Class Correlation ◽  
Treatment Groups ◽  
Computer Based Learning ◽  
Intelligence Activity ◽  
Computer Based ◽  
High Degree ◽  
Intra Class Correlation Coefficient

This study aims to test an interactive pedagogical tool using a computer-based learning approach. The purpose of building Multiple Intelligences Activities Flip Module is to increase students’ potentials through their multiple intelligences. The true-experimental study design is used and the samples are randomly selected as control and treatment groups. Pre and post tests are used to measure the effectiveness of this interactive flip module in relations to multiple intelligences significant differences. The findings of the study reveal that the interactive Multiple Intelligences Activity flip module has a high degree of reliability whereby the average measure for Intra-class Correlation Coefficient is .771 with a 95% confidence interval from .520 to .931 (F(9,486)= 4.644, p<.000). Based on MANCOVA test analysis, the researchers have rejected the null hypothesis. The study has demonstrated that the Multiple Intelligence Activity flip module has increased the scores of multiple intelligences tests for treatment groups.

scholarly journals The Influence of Maximal Strength and Knee Angle on the Reliability of Peak Force in the Isometric Squat

Sports ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 140
Author(s):  
Arthur E. Lynch ◽  
Robert W. Davies ◽  
Philip M. Jakeman ◽  
Tim Locke ◽  
Joanna M. Allardyce ◽  
...  
Keyword(s):  
Peak Force ◽  
Knee Angle ◽  
Force Output ◽  
Reliable Measure ◽  
Intra Class Correlation ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
Intra Class Correlation Coefficient ◽  
Acceptable Reliability ◽  
Maximal Effort

This study aimed to investigate the test-retest reliability of peak force in the isometric squat across the strength spectrum using coefficient of variation (CV) and intra-class correlation coefficient (ICC). On two separate days, 59 healthy men (mean (SD) age 23.0 (4.1) years; height 1.79 (0.7) m; body mass 84.0 (15.2) kg) performed three maximal effort isometric squats in two positions (at a 120° and a 90° knee angle). Acceptable reliability was observed at both the 120° (CV = 7.5 (6.7), ICC = 0.960 [0.933, 0.977]) and 90° positions (CV = 9.2 (8.8), ICC = 0.920 [0.865, 0.953]). There was no relationship between peak force in the isometric squat and the test-retest reliability at either the 120° (r = 0.052, p = 0.327) or 90° (r = 0.014, p = 0.613) positions. A subgroup of subjects (n = 17) also completed the isometric squat test at a 65° knee angle. Acceptable reliability was observed in this position (CV = 9.6 (9.3), ICC = 0.916 [0.766, 0.970]) and reliability was comparable to the 120° and 90° positions. Therefore, we deem isometric squat peak force output to be a valid and reliable measure across the strength spectrum and in different isometric squat positions.

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